diff --git a/src/addresses.h b/src/addresses.h
index 810491d684..92b389d43c 100644
--- a/src/addresses.h
+++ b/src/addresses.h
@@ -48,7 +48,6 @@
 #define RCT2_ADDRESS_SCROLLING_MODE_POSITIONS		0x00992FB8
 
 #define RCT2_ADDRESS_LAND_TOOL_SIZE					0x009A9800
-#define RCT2_ADDRESS_SAVE_PROMPT_MODE				0x009A9802
 #define RCT2_ADDRESS_BTM_TOOLBAR_DIRTY_FLAGS		0x009A9804
 #define RCT2_ADDRESS_MAP_TOOLTIP_ARGS				0x009A9808
 
@@ -215,9 +214,6 @@
 #define RCT2_ADDRESS_COMMAND_MAP_Y					0x009DEA60
 #define RCT2_ADDRESS_COMMAND_MAP_Z					0x009DEA62
 
-//Counts how many ticks the current screen has been open for
-#define RCT2_ADDRESS_SCREEN_AGE						0x009DEA66
-#define RCT2_ADDRESS_SCREEN_FLAGS					0x009DEA68
 #define RCT2_ADDRESS_SCREENSHOT_COUNTDOWN			0x009DEA6D
 // Note: not only the zeroth bit can be set to control pause
 // When paused by saving track 2nd bit is set
@@ -587,6 +583,7 @@
 #define RCT2_ADDRESS_X_END_POINT_GLOBAL				0x9ABDA8	//sint16
 #define RCT2_ADDRESS_X_START_POINT_GLOBAL			0xEDF80C	//sint16
 #define RCT2_ADDRESS_DPI_LINE_LENGTH_GLOBAL			0x9ABDB0	//uint16 width+pitch
+#define RCT2_ADDRESS_SAVE_PROMPT_MODE				0x009A9802
 #define RCT2_ADDRESS_CONFIG_FIRST_TIME_LOAD_OBJECTS 0x009AA00D
 #define RCT2_ADDRESS_CONFIG_FIRST_TIME_LOAD_CONFIG	0x009AB4C6
 #define RCT2_ADDRESS_NAUSEA_THRESHOLDS				0x00982390  //uint16
@@ -596,6 +593,9 @@
 #define RCT2_ADDRESS_CURRENT_TOOL					0x009DE545
 #define RCT2_ADDRESS_TOOL_WIDGETINDEX				0x009DE546
 
+#define RCT2_ADDRESS_SCREEN_AGE						0x009DEA66
+#define RCT2_ADDRESS_SCREEN_FLAGS					0x009DEA68
+
 #define RCT2_ADDRESS_PARK_ENTRANCE_GHOST_X			0x009E32CC
 #define RCT2_ADDRESS_PARK_ENTRANCE_GHOST_Y			0x009E32CE
 #define RCT2_ADDRESS_PARK_ENTRANCE_GHOST_Z			0x009E32D0
diff --git a/src/audio/audio.c b/src/audio/audio.c
index f6b8cff57f..92ccc1685d 100644
--- a/src/audio/audio.c
+++ b/src/audio/audio.c
@@ -254,7 +254,7 @@ int audio_play_sound(int soundId, int volume, int pan)
 
 void audio_start_title_music()
 {
-	if (gGameSoundsOff || !(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)) {
+	if (gGameSoundsOff || !(gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)) {
 		audio_stop_title_music();
 		return;
 	}
diff --git a/src/audio/mixer.cpp b/src/audio/mixer.cpp
index 833440d9e9..6aefcc1af3 100644
--- a/src/audio/mixer.cpp
+++ b/src/audio/mixer.cpp
@@ -677,7 +677,7 @@ void Mixer::MixChannel(Channel& channel, uint8* data, int length)
 					volumeadjust *= (gConfigSound.sound_volume / 100.0f);
 
 					// Cap sound volume on title screen so music is more audible
-					if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) {
+					if (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) {
 						volumeadjust = Math::Min(volumeadjust, 0.75f);
 					}
 					break;
diff --git a/src/editor.c b/src/editor.c
index 6ebf0ea4e2..0bf89470f8 100644
--- a/src/editor.c
+++ b/src/editor.c
@@ -77,7 +77,7 @@ void editor_load()
 	date_reset();
 	window_guest_list_init_vars_b();
 	window_staff_list_init_vars();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_SCENARIO_EDITOR;
+	gScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR;
 	RCT2_GLOBAL(0x0141F570, uint8) = 0;
 	gParkFlags |= PARK_FLAGS_SHOW_REAL_GUEST_NAMES;
 	window_new_ride_init_vars();
@@ -90,7 +90,7 @@ void editor_load()
 	mainWindow->flags &= ~WF_SCROLLING_TO_LOCATION;
 	load_palette();
 	gfx_invalidate_screen();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16) = 0;
+	gScreenAge = 0;
 
 	safe_strcpy((char*)RCT2_ADDRESS_SCENARIO_NAME, language_get_string(2749), 0x40);
 }
@@ -137,14 +137,14 @@ void editor_convert_save_to_scenario_callback(int result)
 		s6Info->name[0] = 0;
 	}
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_SCENARIO_EDITOR;
+	gScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR;
 	s6Info->editor_step = EDITOR_STEP_OBJECTIVE_SELECTION;
 	s6Info->category = SCENARIO_CATEGORY_OTHER;
 	viewport_init_all();
 	news_item_init_queue();
 	window_editor_main_open();
 	editor_finalise_main_view();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+	gScreenAge = 0;
 }
 
 /**
@@ -155,8 +155,8 @@ void trackdesigner_load()
 {
 	rct_window *mainWindow;
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_TRACK_DESIGNER;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16) = 0;
+	gScreenFlags = SCREEN_FLAGS_TRACK_DESIGNER;
+	gScreenAge = 0;
 
 	object_unload_all();
 	map_init(150);
@@ -193,8 +193,8 @@ void trackmanager_load()
 {
 	rct_window *mainWindow;
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_TRACK_MANAGER;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16) = 0;
+	gScreenFlags = SCREEN_FLAGS_TRACK_MANAGER;
+	gScreenAge = 0;
 
 	object_unload_all();
 	map_init(150);
@@ -265,8 +265,8 @@ static int editor_load_landscape_from_sv4(const char *path)
 	editor_clear_map_for_editing();
 
 	g_editor_step = EDITOR_STEP_LANDSCAPE_EDITOR;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_SCENARIO_EDITOR;
+	gScreenAge = 0;
+	gScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR;
 	viewport_init_all();
 	window_editor_main_open();
 	editor_finalise_main_view();
@@ -279,8 +279,8 @@ static int editor_load_landscape_from_sc4(const char *path)
 	editor_clear_map_for_editing();
 
 	g_editor_step = EDITOR_STEP_LANDSCAPE_EDITOR;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_SCENARIO_EDITOR;
+	gScreenAge = 0;
+	gScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR;
 	viewport_init_all();
 	window_editor_main_open();
 	editor_finalise_main_view();
@@ -383,7 +383,7 @@ static int editor_read_s6(const char *path)
 		map_update_tile_pointers();
 		game_convert_strings_to_utf8();
 
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_SCENARIO_EDITOR;
+		gScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR;
 		viewport_init_all();
 		window_editor_main_open();
 		editor_finalise_main_view();
@@ -491,7 +491,7 @@ static void editor_clear_map_for_editing()
  */
 void editor_open_windows_for_current_step()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR))
+	if (!(gScreenFlags & SCREEN_FLAGS_EDITOR))
 		return;
 
 	switch (g_editor_step) {
@@ -502,7 +502,7 @@ void editor_open_windows_for_current_step()
 		if (window_find_by_class(49))
 			return;
 
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+		if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 			object_unload_all();
 		}
 
@@ -586,7 +586,7 @@ static bool editor_check_object_group_at_least_one_selected(int objectType)
 int editor_check_object_selection()
 {
 	bool isTrackDesignerManager =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER);
+		gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER);
 
 	if (!isTrackDesignerManager) {
 		if (!editor_check_object_group_at_least_one_selected(OBJECT_TYPE_PATHS)) {
diff --git a/src/game.c b/src/game.c
index f51ef0ee92..a8562fed6e 100644
--- a/src/game.c
+++ b/src/game.c
@@ -354,9 +354,9 @@ void game_logic_update()
 	}
 	gCurrentTicks++;
 	RCT2_GLOBAL(RCT2_ADDRESS_SCENARIO_TICKS, uint32)++;
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16)++;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16) == 0)
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16)--;
+	gScreenAge++;
+	if (gScreenAge == 0)
+		gScreenAge--;
 
 	sub_68B089();
 	scenario_update();
@@ -600,7 +600,7 @@ static void game_load_or_quit(int *eax, int *ebx, int *ecx, int *edx, int *esi,
 	if (*ebx & GAME_COMMAND_FLAG_APPLY) {
 		switch (*edx & 0xFF) {
 		case 0:
-			RCT2_GLOBAL(RCT2_ADDRESS_SAVE_PROMPT_MODE, uint16) = *edi & 0xFF;
+			gSavePromptMode = *edi & 0xFF;
 			window_save_prompt_open();
 			break;
 		case 1:
@@ -783,7 +783,7 @@ int game_load_sv6(SDL_RWops* rw)
 	game_fix_save_vars(); // OpenRCT2 fix broken save games
 
 	// #2407: Resetting screen time to not open a save prompt shortly after loading a park.
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+	gScreenAge = 0;
 
 	gLastAutoSaveTick = SDL_GetTicks();
 	return 1;
@@ -944,7 +944,7 @@ void game_load_init()
 {
 	rct_window *mainWindow;
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_PLAYING;
+	gScreenFlags = SCREEN_FLAGS_PLAYING;
 	viewport_init_all();
 	game_create_windows();
 	mainWindow = window_get_main();
@@ -1010,7 +1010,7 @@ void save_game()
 
 			// Setting screen age to zero, so no prompt will pop up when closing the
 			// game shortly after saving.
-			RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+			gScreenAge = 0;
 		}
 	} else {
 		save_game_as();
@@ -1165,15 +1165,17 @@ void rct2_exit()
  */
 void game_load_or_quit_no_save_prompt()
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SAVE_PROMPT_MODE, uint16) < 1) {
+	switch (gSavePromptMode) {
+	case PM_SAVE_BEFORE_LOAD:
 		game_do_command(0, 1, 0, 1, GAME_COMMAND_LOAD_OR_QUIT, 0, 0);
 		tool_cancel();
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+		if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 			load_landscape();
 		} else {
 			window_loadsave_open(LOADSAVETYPE_LOAD | LOADSAVETYPE_GAME, NULL);
 		}
-	} else if (RCT2_GLOBAL(RCT2_ADDRESS_SAVE_PROMPT_MODE, uint16) == 1) {
+		break;
+	case PM_SAVE_BEFORE_QUIT:
 		game_do_command(0, 1, 0, 1, GAME_COMMAND_LOAD_OR_QUIT, 0, 0);
 		tool_cancel();
 		if (gInputFlags & INPUT_FLAG_5) {
@@ -1181,8 +1183,10 @@ void game_load_or_quit_no_save_prompt()
 		}
 		gGameSpeed = 1;
 		title_load();
-	} else {
+		break;
+	default:
 		rct2_exit();
+		break;
 	}
 }
 
diff --git a/src/input.c b/src/input.c
index ab8efc3672..2ff1c01024 100644
--- a/src/input.c
+++ b/src/input.c
@@ -327,7 +327,7 @@ static void game_handle_input_mouse(int x, int y, int state)
 			if (widgetIndex != -1) {
 				switch (widget->type) {
 				case WWT_VIEWPORT:
-					if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_MANAGER | SCREEN_FLAGS_TITLE_DEMO))) {
+					if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_MANAGER | SCREEN_FLAGS_TITLE_DEMO))) {
 						input_viewport_drag_begin(w, x, y);
 					}
 					break;
@@ -1610,7 +1610,7 @@ void game_handle_edge_scroll()
 	mainWindow = window_get_main();
 	if (mainWindow == NULL)
 		return;
-	if ((mainWindow->flags & WF_NO_SCROLLING) || (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 9))
+	if ((mainWindow->flags & WF_NO_SCROLLING) || (gScreenFlags & 9))
 		return;
 	if (mainWindow->viewport == NULL)
 		return;
@@ -1653,7 +1653,7 @@ void game_handle_key_scroll()
 	mainWindow = window_get_main();
 	if (mainWindow == NULL)
 		return;
-	if ((mainWindow->flags & WF_NO_SCROLLING) || (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 9))
+	if ((mainWindow->flags & WF_NO_SCROLLING) || (gScreenFlags & 9))
 		return;
 	if (mainWindow->viewport == NULL)
 		return;
diff --git a/src/interface/console.c b/src/interface/console.c
index 79467ecd93..e3a50fbdd0 100644
--- a/src/interface/console.c
+++ b/src/interface/console.c
@@ -903,7 +903,7 @@ static int cc_fix_banner_count(const utf8 **argv, int argc)
 
 static int cc_open(const utf8 **argv, int argc) {
 	if (argc > 0) {
-		bool title = (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) != 0;
+		bool title = (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) != 0;
 		bool invalidTitle = false;
 		if (strcmp(argv[0], "object_selection") == 0 && invalidArguments(&invalidTitle, !title)) {
 			// Only this window should be open for safety reasons
diff --git a/src/interface/keyboard_shortcut.c b/src/interface/keyboard_shortcut.c
index 967e3af26b..8f8e633c67 100644
--- a/src/interface/keyboard_shortcut.c
+++ b/src/interface/keyboard_shortcut.c
@@ -132,7 +132,7 @@ static void shortcut_close_top_most_window()
 
 static void shortcut_close_all_floating_windows()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR))
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR))
 		window_close_all();
 	else if (RCT2_GLOBAL(0x0141F570, uint8) == 1)
 		window_close_top();
@@ -153,7 +153,7 @@ static void shortcut_pause_game()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_MANAGER))) {
 		window = window_find_by_class(WC_TOP_TOOLBAR);
 		if (window != NULL) {
 			window_invalidate(window);
@@ -166,8 +166,8 @@ static void shortcut_zoom_view_out()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -181,8 +181,8 @@ static void shortcut_zoom_view_in()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -264,7 +264,7 @@ static void shortcut_remove_vertical_land_toggle()
 
 static void shortcut_remove_top_bottom_toolbar_toggle()
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)
+	if (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)
 		return;
 
 	if (window_find_by_class(WC_TOP_TOOLBAR) != NULL) {
@@ -272,7 +272,7 @@ static void shortcut_remove_top_bottom_toolbar_toggle()
 		window_close(window_find_by_class(WC_TOP_TOOLBAR));
 		window_close(window_find_by_class(WC_BOTTOM_TOOLBAR));
 	} else {
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == 0) {
+		if (gScreenFlags == 0) {
 			window_top_toolbar_open();
 			window_game_bottom_toolbar_open();
 		} else {
@@ -321,8 +321,8 @@ static void shortcut_adjust_land()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -336,8 +336,8 @@ static void shortcut_adjust_water()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -351,8 +351,8 @@ static void shortcut_build_scenery()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -366,8 +366,8 @@ static void shortcut_build_paths()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1) {
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -381,8 +381,8 @@ static void shortcut_build_new_ride()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)) {
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)) {
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 			window = window_find_by_class(WC_TOP_TOOLBAR);
 			if (window != NULL) {
 				window_invalidate(window);
@@ -394,14 +394,14 @@ static void shortcut_build_new_ride()
 
 static void shortcut_show_financial_information()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
+	if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
 		if (!(gParkFlags & PARK_FLAGS_NO_MONEY))
 			window_finances_open();
 }
 
 static void shortcut_show_research_information()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 		if (gConfigInterface.toolbar_show_research)
 			window_research_open();
 		else
@@ -413,7 +413,7 @@ static void shortcut_show_rides_list()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 		window = window_find_by_class(WC_TOP_TOOLBAR);
 		if (window != NULL) {
 			window_invalidate(window);
@@ -426,7 +426,7 @@ static void shortcut_show_park_information()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 		window = window_find_by_class(WC_TOP_TOOLBAR);
 		if (window != NULL) {
 			window_invalidate(window);
@@ -439,7 +439,7 @@ static void shortcut_show_guest_list()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 		window = window_find_by_class(WC_TOP_TOOLBAR);
 		if (window != NULL) {
 			window_invalidate(window);
@@ -452,7 +452,7 @@ static void shortcut_show_staff_list()
 {
 	rct_window *window;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))) {
 		window = window_find_by_class(WC_TOP_TOOLBAR);
 		if (window != NULL) {
 			window_invalidate(window);
@@ -463,14 +463,14 @@ static void shortcut_show_staff_list()
 
 static void shortcut_show_recent_messages()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
+	if (!(gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
 		window_news_open();
 }
 
 static void shortcut_show_map()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1)
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || RCT2_GLOBAL(0x0141F570, uint8) == 1)
+		if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)))
 			window_map_open();
 }
 
@@ -495,7 +495,7 @@ static void shortcut_open_cheat_window()
 {
 	rct_window *window;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) != SCREEN_FLAGS_PLAYING)
+	if (gScreenFlags != SCREEN_FLAGS_PLAYING)
 		return;
 
 	// Check if window is already open
@@ -515,11 +515,11 @@ static void shortcut_open_chat_window()
 static void shortcut_quick_save_game()
 {
 	// Do a quick save in playing mode and a regular save in Scenario Editor mode. In other cases, don't do anything.
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_PLAYING) {
+	if (gScreenFlags == SCREEN_FLAGS_PLAYING) {
 		tool_cancel();
 		save_game();
 	}
-	else if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+	else if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 		rct_s6_info *s6Info = (rct_s6_info*)0x0141F570;
 		window_loadsave_open(LOADSAVETYPE_SAVE | LOADSAVETYPE_LANDSCAPE, s6Info->name);
 	}
diff --git a/src/interface/screenshot.c b/src/interface/screenshot.c
index fdda32edbe..31d413586b 100644
--- a/src/interface/screenshot.c
+++ b/src/interface/screenshot.c
@@ -307,7 +307,7 @@ int cmdline_for_screenshot(const char **argv, int argc)
 		rct2_open_file(inputPath);
 
 		RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) = 0;
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_PLAYING;
+		gScreenFlags = SCREEN_FLAGS_PLAYING;
 
 		int mapSize = RCT2_GLOBAL(RCT2_ADDRESS_MAP_SIZE, uint16);
 		if (resolutionWidth == 0 || resolutionHeight == 0) {
diff --git a/src/interface/viewport_interaction.c b/src/interface/viewport_interaction.c
index 42c0544c65..b34ffb566c 100644
--- a/src/interface/viewport_interaction.c
+++ b/src/interface/viewport_interaction.c
@@ -53,11 +53,11 @@ int viewport_interaction_get_item_left(int x, int y, viewport_interaction_info *
 	rct_vehicle *vehicle;
 
 	// No click input for title screen or scenario editor or track manager
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_MANAGER))
+	if (gScreenFlags & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_MANAGER))
 		return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 
 	//
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) && s6Info->editor_step != EDITOR_STEP_ROLLERCOASTER_DESIGNER)
+	if ((gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) && s6Info->editor_step != EDITOR_STEP_ROLLERCOASTER_DESIGNER)
 		return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 
 	rct_xy16 mapCoord = { 0 };
@@ -176,11 +176,11 @@ int viewport_interaction_get_item_right(int x, int y, viewport_interaction_info
 	int i, stationIndex;
 
 	// No click input for title screen or track manager
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_TRACK_MANAGER))
+	if (gScreenFlags & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_TRACK_MANAGER))
 		return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 
 	//
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) && s6Info->editor_step != EDITOR_STEP_ROLLERCOASTER_DESIGNER)
+	if ((gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) && s6Info->editor_step != EDITOR_STEP_ROLLERCOASTER_DESIGNER)
 		return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 
 	rct_xy16 mapCoord = { 0 };
@@ -192,7 +192,7 @@ int viewport_interaction_get_item_right(int x, int y, viewport_interaction_info
 
 	switch (info->type) {
 	case VIEWPORT_INTERACTION_ITEM_SPRITE:
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || mapElement->type != 0)
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || mapElement->type != 0)
 			return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 
 		mapElement += 6;
@@ -205,7 +205,7 @@ int viewport_interaction_get_item_right(int x, int y, viewport_interaction_info
 		return info->type;
 
 	case VIEWPORT_INTERACTION_ITEM_RIDE:
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+		if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 			return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
 		if (map_element_get_type(mapElement) == MAP_ELEMENT_TYPE_PATH)
 			return info->type = VIEWPORT_INTERACTION_ITEM_NONE;
@@ -304,7 +304,7 @@ int viewport_interaction_get_item_right(int x, int y, viewport_interaction_info
 		return info->type;
 
 	case VIEWPORT_INTERACTION_ITEM_PARK:
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode)
+		if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode)
 			break;
 
 		if (map_element_get_type(mapElement) != MAP_ELEMENT_TYPE_ENTRANCE)
diff --git a/src/interface/window.c b/src/interface/window.c
index f74a102aa7..07f3f51fcb 100644
--- a/src/interface/window.c
+++ b/src/interface/window.c
@@ -263,7 +263,7 @@ static int window_wheel_input(rct_window *w, int wheel)
  */
 static void window_viewport_wheel_input(rct_window *w, int wheel)
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 9)
+	if (gScreenFlags & 9)
 		return;
 
 	if (wheel < 0)
@@ -798,7 +798,7 @@ void window_close_top()
 
 	window_close_by_class(WC_DROPDOWN);
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 2)
+	if (gScreenFlags & 2)
 		if (RCT2_GLOBAL(0x0141F570, uint8) != 1)
 			return;
 
@@ -1343,7 +1343,7 @@ void window_scroll_to_location(rct_window *w, int x, int y, int z)
 		rct_xy16 map_coordinate = coordinate_3d_to_2d(&location_3d, get_current_rotation());
 
 		int i = 0;
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)) {
+		if (!(gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)) {
 			int found = 0;
 			while (!found) {
 				sint16 x2 = w->viewport->x + (sint16)(w->viewport->width * window_scroll_locations[i][0]);
@@ -2075,7 +2075,7 @@ void window_relocate_windows(int width, int height){
 */
 void window_resize_gui(int width, int height)
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 0xE){
+	if (gScreenFlags & 0xE){
 		window_resize_gui_scenario_editor(width, height);
 		return;
 	}
diff --git a/src/management/news_item.c b/src/management/news_item.c
index bd3d10ded7..f6515e7971 100644
--- a/src/management/news_item.c
+++ b/src/management/news_item.c
@@ -83,7 +83,7 @@ static void news_item_tick_current()
 	int ticks;
 	ticks = ++news_item_get(0)->ticks;
 	// Only play news item sound when in normal playing mode
-	if (ticks == 1 && (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_PLAYING)) {
+	if (ticks == 1 && (gScreenFlags == SCREEN_FLAGS_PLAYING)) {
 		// Play sound
 		audio_play_sound_panned(SOUND_NEWS_ITEM, RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_WIDTH, uint16) / 2, 0, 0, 0);
 	}
diff --git a/src/management/research.c b/src/management/research.c
index 31adc3b188..fe54654078 100644
--- a/src/management/research.c
+++ b/src/management/research.c
@@ -244,7 +244,7 @@ void research_update()
 	int editorScreenFlags, researchLevel, currentResearchProgress;
 
 	editorScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & editorScreenFlags)
+	if (gScreenFlags & editorScreenFlags)
 		return;
 
 	if (RCT2_GLOBAL(RCT2_ADDRESS_SCENARIO_TICKS, uint32) % 32 != 0)
diff --git a/src/network/twitch.cpp b/src/network/twitch.cpp
index b52fecd95a..f531697ce4 100644
--- a/src/network/twitch.cpp
+++ b/src/network/twitch.cpp
@@ -110,7 +110,7 @@ namespace Twitch
     static bool IsTwitchEnabled()
     {
         if (!gTwitchEnable) return false;
-        if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (~SCREEN_FLAGS_PLAYING)) return false;
+        if (gScreenFlags & (~SCREEN_FLAGS_PLAYING)) return false;
         if (String::IsNullOrEmpty(gConfigTwitch.channel)) return false;
         return true;
     }
diff --git a/src/openrct2.c b/src/openrct2.c
index 7c36fffd6f..ce22cf4994 100644
--- a/src/openrct2.c
+++ b/src/openrct2.c
@@ -276,7 +276,7 @@ void openrct2_launch()
 			RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) = 1;
 			break;
 		case STARTUP_ACTION_TITLE:
-			RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_TITLE_DEMO;
+			gScreenFlags = SCREEN_FLAGS_TITLE_DEMO;
 			break;
 		case STARTUP_ACTION_OPEN:
 			assert(gOpenRCT2StartupActionPath != NULL);
@@ -284,7 +284,7 @@ void openrct2_launch()
 				break;
 			}
 
-			RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_PLAYING;
+			gScreenFlags = SCREEN_FLAGS_PLAYING;
 
 #ifndef DISABLE_NETWORK
 			if (gNetworkStart == NETWORK_MODE_SERVER) {
diff --git a/src/peep/peep.c b/src/peep/peep.c
index 0506875b84..b50d90bb53 100644
--- a/src/peep/peep.c
+++ b/src/peep/peep.c
@@ -169,7 +169,7 @@ void peep_update_all()
 	uint16 spriteIndex;
 	rct_peep* peep;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 0x0E)
+	if (gScreenFlags & 0x0E)
 		return;
 
 	spriteIndex = RCT2_GLOBAL(RCT2_ADDRESS_SPRITES_START_PEEP, uint16);
@@ -3267,7 +3267,7 @@ static void peep_update_ride_sub_state_20(rct_peep* peep){
 	}
 
 	// Do not play toilet flush sound on title screen as its considered loud and annoying
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)) {
 		audio_play_sound_at_location(SOUND_TOILET_FLUSH, peep->x, peep->y, peep->z);
 	}
 
@@ -5935,7 +5935,7 @@ void peep_update_crowd_noise()
 	if (!gConfigSound.sound_enabled)
 		return;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 2)
+	if (gScreenFlags & 2)
 		return;
 
 	viewport = RCT2_GLOBAL(0x00F438A4, rct_viewport*);
diff --git a/src/rct2.c b/src/rct2.c
index c1d274873c..2474483474 100644
--- a/src/rct2.c
+++ b/src/rct2.c
@@ -111,6 +111,10 @@ const char * const RCT2FilePaths[PATH_ID_END] = {
 
 uint32 gCurrentDrawCount = 0;
 
+uint8 gScreenFlags;
+uint32 gScreenAge;
+uint8 gSavePromptMode;
+
 typedef struct tm tm_t;
 
 void print_launch_information();
@@ -122,7 +126,7 @@ static void rct2_draw_fps();
 
 void rct2_quit()
 {
-	RCT2_GLOBAL(RCT2_ADDRESS_SAVE_PROMPT_MODE, uint16) = PM_QUIT;
+	gSavePromptMode = PM_QUIT;
 	window_save_prompt_open();
 }
 
@@ -286,7 +290,7 @@ void rct2_draw()
 
 	if (RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) != 0) {
 		//intro
-	} else if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) {
+	} else if (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) {
 		//title
 		DrawOpenRCT2(0, RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_HEIGHT, uint16) - 20);
 	} else {
@@ -454,7 +458,7 @@ void rct2_update()
 	// Screens
 	if (RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) != 0)
 		intro_update();
-	else if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) && !gOpenRCT2Headless)
+	else if ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) && !gOpenRCT2Headless)
 		title_update();
 	else
 		game_update();
diff --git a/src/rct2.h b/src/rct2.h
index 1249b87d61..f03b3fe358 100644
--- a/src/rct2.h
+++ b/src/rct2.h
@@ -281,6 +281,10 @@ extern const char * const RCT2FilePaths[PATH_ID_END];
 
 extern uint32 gCurrentDrawCount;
 
+extern uint8 gScreenFlags;
+extern uint32 gScreenAge;
+extern uint8 gSavePromptMode;
+
 int rct2_init();
 void rct2_dispose();
 void rct2_update();
diff --git a/src/ride/ride.c b/src/ride/ride.c
index 811a0019b7..2c5bd69df7 100644
--- a/src/ride/ride.c
+++ b/src/ride/ride.c
@@ -1878,7 +1878,7 @@ void ride_update_all()
 	int i;
 
 	// Remove all rides if scenario editor
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+	if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 		if (s6Info->editor_step <= EDITOR_STEP_INVENTIONS_LIST_SET_UP)
 			FOR_ALL_RIDES(i, ride)
 				ride->type = RIDE_TYPE_NULL;
@@ -2098,7 +2098,7 @@ static void ride_inspection_update(rct_ride *ride)
 
 	if (gCurrentTicks & 2047)
 		return;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 		return;
 
 	ride->last_inspection++;
@@ -2163,7 +2163,7 @@ static void ride_breakdown_update(int rideIndex)
 
 	if (gCurrentTicks & 255)
 		return;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 		return;
 
 	if (ride->lifecycle_flags & (RIDE_LIFECYCLE_BROKEN_DOWN | RIDE_LIFECYCLE_CRASHED))
@@ -2831,7 +2831,7 @@ void ride_measurements_update()
 	int i, j;
 	uint16 spriteIndex;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+	if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 		return;
 
 	// For each ride measurement
@@ -3336,7 +3336,7 @@ void ride_set_map_tooltip(rct_map_element *mapElement)
  */
 int ride_music_params_update(sint16 x, sint16 y, sint16 z, uint8 rideIndex, uint16 sampleRate, uint32 position, uint8 *tuneId)
 {
-	if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gGameSoundsOff && RCT2_GLOBAL(0x00F438A4, rct_viewport*) != (rct_viewport*)-1) {
+	if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gGameSoundsOff && RCT2_GLOBAL(0x00F438A4, rct_viewport*) != (rct_viewport*)-1) {
 		rct_xy16 rotatedCoords;
 
 		switch (get_current_rotation()) {
@@ -3546,9 +3546,9 @@ void ride_music_update_final()
 {
 	rct_ride_music_params* edi = NULL;
 	int ebx;
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 2)) {
+	if (!(gScreenFlags & 2)) {
 		// TODO Allow circus music (CSS24) to play if ride music is disabled (that should be sound)
-		if (!gGameSoundsOff && gConfigSound.ride_music_enabled && !(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 1)) {
+		if (!gGameSoundsOff && gConfigSound.ride_music_enabled && !(gScreenFlags & 1)) {
 			// set to stop music if volume <= 1 ?
 			while (1) {
 				int v8 = 0;
@@ -8389,7 +8389,7 @@ void ride_crash(uint8 rideIndex, uint8 vehicleIndex)
 	ride = get_ride(rideIndex);
 	vehicle = GET_VEHICLE(ride->vehicles[vehicleIndex]);
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)) {
 		// Open ride window for crashed vehicle
 		w = window_ride_open_vehicle(vehicle);
 		if (w->viewport != NULL) {
diff --git a/src/ride/ride_ratings.c b/src/ride/ride_ratings.c
index 41e52065e7..54bf84510b 100644
--- a/src/ride/ride_ratings.c
+++ b/src/ride/ride_ratings.c
@@ -101,7 +101,7 @@ static void ride_ratings_score_close_proximity(rct_map_element *mapElement);
  */
 void ride_ratings_update_all()
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+	if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 		return;
 
 	switch (_rideRatingsState) {
diff --git a/src/ride/track.c b/src/ride/track.c
index 5b4bb7dc12..0c5789e611 100644
--- a/src/ride/track.c
+++ b/src/ride/track.c
@@ -1085,7 +1085,7 @@ int track_place_scenery(rct_track_scenery* scenery_start, uint8 rideIndex, int o
 					entry_type = scenery->scenery_object.flags & 0xF;
 					if (entry_type != OBJECT_TYPE_PATHS)
 						entry_type = 0xFF;
-					if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8)&SCREEN_FLAGS_TRACK_DESIGNER)
+					if (gScreenFlags&SCREEN_FLAGS_TRACK_DESIGNER)
 						entry_type = 0xFF;
 
 					entry_index = 0;
@@ -1184,7 +1184,7 @@ int track_place_scenery(rct_track_scenery* scenery_start, uint8 rideIndex, int o
 						continue;
 					}
 
-					if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8)&SCREEN_FLAGS_TRACK_DESIGNER){
+					if (gScreenFlags&SCREEN_FLAGS_TRACK_DESIGNER){
 						RCT2_GLOBAL(0x00F4414E, uint8) |= 1 << 1;
 						continue;
 					}
@@ -2104,7 +2104,7 @@ void draw_track_preview(uint8** preview){
 
 	blank_map();
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER){
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER){
 		load_track_scenery_objects();
 	}
 
diff --git a/src/ride/vehicle.c b/src/ride/vehicle.c
index 0b2ad10ac1..78a5d03f7f 100644
--- a/src/ride/vehicle.c
+++ b/src/ride/vehicle.c
@@ -233,7 +233,7 @@ void vehicle_invalidate(rct_vehicle *vehicle)
  */
 void vehicle_update_sound_params(rct_vehicle* vehicle)
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) || RCT2_GLOBAL(0x0141F570, uint8) == 6)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (!(gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) || RCT2_GLOBAL(0x0141F570, uint8) == 6)) {
 		if (vehicle->sound1_id != (uint8)-1 || vehicle->sound2_id != (uint8)-1) {
 			if (vehicle->sprite_left != (sint16)0x8000) {
 				sint16 x = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_x;
@@ -623,10 +623,10 @@ void vehicle_update_all()
 	uint16 sprite_index;
 	rct_vehicle *vehicle;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+	if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 		return;
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) && RCT2_GLOBAL(0x0141F570, uint8) != 6)
+	if ((gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) && RCT2_GLOBAL(0x0141F570, uint8) != 6)
 		return;
 
 
diff --git a/src/scenario.c b/src/scenario.c
index 0a74819873..d400986e41 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -234,7 +234,7 @@ void scenario_begin()
 	rct_s6_info *s6Info = (rct_s6_info*)0x0141F570;
 	rct_window *mainWindow;
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_PLAYING;
+	gScreenFlags = SCREEN_FLAGS_PLAYING;
 	viewport_init_all();
 	game_create_windows();
 	mainWindow = window_get_main();
@@ -371,7 +371,7 @@ void scenario_begin()
 	load_palette();
 
 	gfx_invalidate_screen();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+	gScreenAge = 0;
 	gGameSpeed = 1;
 }
 
@@ -574,7 +574,7 @@ static void scenario_update_daynight_cycle()
 	float currentDayNightCycle = gDayNightCycle;
 	gDayNightCycle = 0;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_PLAYING && gConfigGeneral.day_night_cycle) {
+	if (gScreenFlags == SCREEN_FLAGS_PLAYING && gConfigGeneral.day_night_cycle) {
 		float monthFraction = gDateMonthTicks / (float)0x10000;
 		if (monthFraction < (1 / 8.0f)) {
 			gDayNightCycle = 0.0f;
@@ -601,7 +601,7 @@ static void scenario_update_daynight_cycle()
  */
 void scenario_update()
 {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & ~SCREEN_FLAGS_PLAYING)) {
+	if (!(gScreenFlags & ~SCREEN_FLAGS_PLAYING)) {
 		uint32 currentMonthTick = gDateMonthTicks;
 		uint32 nextMonthTick = currentMonthTick + 4;
 		uint8 currentMonth = gDateMonthsElapsed & 7;
@@ -1029,7 +1029,7 @@ int scenario_save(SDL_RWops* rw, int flags)
 
 	gfx_invalidate_screen();
 	if (!(flags & 0x80000000))
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+		gScreenAge = 0;
 	return 1;
 }
 
diff --git a/src/title.c b/src/title.c
index 4a5edec729..bb1a668e55 100644
--- a/src/title.c
+++ b/src/title.c
@@ -108,7 +108,7 @@ void title_load()
 	if (RCT2_GLOBAL(RCT2_ADDRESS_GAME_PAUSED, uint8) & 1)
 		pause_toggle();
 
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_TITLE_DEMO;
+	gScreenFlags = SCREEN_FLAGS_TITLE_DEMO;
 
 	reset_park_entrances();
 	user_string_clear_all();
@@ -134,7 +134,7 @@ void title_load()
 	title_create_windows();
 	title_init_showcase();
 	gfx_invalidate_screen();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) = 0;
+	gScreenAge = 0;
 #ifndef DISABLE_NETWORK
 	network_close();
 #endif
@@ -220,7 +220,7 @@ static int title_load_park(const char *path)
 	scenery_set_default_placement_configuration();
 	news_item_init_queue();
 	gfx_invalidate_screen();
-	RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, sint16) = 0;
+	gScreenAge = 0;
 	gGameSpeed = 1;
 	return 1;
 }
@@ -252,7 +252,7 @@ static void title_set_location(int x, int y)
  */
 void title_fix_location()
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_TITLE_DEMO) {
+	if (gScreenFlags == SCREEN_FLAGS_TITLE_DEMO) {
 		rct_xy16 position = _titleScriptCurrentCentralPosition;
 		if (position.x != -1) {
 			title_set_location(position.x, position.y);
@@ -786,7 +786,7 @@ bool title_refresh_sequence()
 		gTitleScriptCommand = -1;
 		gTitleScriptSave = 0xFF;
 
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_TITLE_DEMO) {
+		if (gScreenFlags == SCREEN_FLAGS_TITLE_DEMO) {
 			title_update_showcase();
 			gfx_invalidate_screen();
 		}
@@ -808,7 +808,7 @@ bool title_refresh_sequence()
 	window_invalidate_by_class(WC_OPTIONS);
 	window_invalidate_by_class(WC_TITLE_EDITOR);
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_TITLE_DEMO) {
+	if (gScreenFlags == SCREEN_FLAGS_TITLE_DEMO) {
 		title_update_showcase();
 		gfx_invalidate_screen();
 	}
diff --git a/src/windows/editor_bottom_toolbar.c b/src/windows/editor_bottom_toolbar.c
index 51e9f6479d..587b4ade2a 100644
--- a/src/windows/editor_bottom_toolbar.c
+++ b/src/windows/editor_bottom_toolbar.c
@@ -270,7 +270,7 @@ void window_editor_bottom_toolbar_jump_forward_from_object_selection()
 	if (!window_editor_bottom_toolbar_check_object_selection())
 		return;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) {
 		sub_66F6E3();
 	} else {
 		sub_6DFED0();
@@ -344,7 +344,7 @@ void window_editor_bottom_toolbar_jump_forward_to_save_scenario()
 static void window_editor_bottom_toolbar_mouseup(rct_window *w, int widgetIndex)
 {
 	if (widgetIndex == WIDX_PREVIOUS_STEP_BUTTON) {
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) ||
+		if ((gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) ||
 			(RCT2_GLOBAL(0x13573C8, uint16) == 0x2710 && !(gParkFlags & PARK_FLAGS_18))) {
 			previous_button_mouseup_events[g_editor_step]();
 		}
@@ -369,7 +369,7 @@ void hide_next_step_button() {
 */
 void window_editor_bottom_toolbar_invalidate(rct_window *w)
 {
-	colour_scheme_update_by_class(w, (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) ? WC_EDITOR_SCENARIO_BOTTOM_TOOLBAR : WC_EDITOR_TRACK_BOTTOM_TOOLBAR);
+	colour_scheme_update_by_class(w, (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) ? WC_EDITOR_SCENARIO_BOTTOM_TOOLBAR : WC_EDITOR_TRACK_BOTTOM_TOOLBAR);
 
 	uint16 screenWidth = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_WIDTH, uint16);
 	window_editor_bottom_toolbar_widgets[WIDX_NEXT_IMAGE].left = screenWidth - 200;
@@ -382,7 +382,7 @@ void window_editor_bottom_toolbar_invalidate(rct_window *w)
 	window_editor_bottom_toolbar_widgets[WIDX_PREVIOUS_IMAGE].type = WWT_IMGBTN;
 	window_editor_bottom_toolbar_widgets[WIDX_NEXT_IMAGE].type = WWT_IMGBTN;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		hide_previous_step_button();
 		hide_next_step_button();
 	} else {
@@ -390,7 +390,7 @@ void window_editor_bottom_toolbar_invalidate(rct_window *w)
 			hide_previous_step_button();
 		} else if (g_editor_step == EDITOR_STEP_ROLLERCOASTER_DESIGNER) {
 			hide_next_step_button();
-		} else if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)) {
+		} else if (!(gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)) {
 			if (RCT2_GLOBAL(0x13573C8, uint16) != 0x2710 || gParkFlags & PARK_FLAGS_18) {
 				hide_previous_step_button();
 			}
@@ -410,7 +410,7 @@ void window_editor_bottom_toolbar_paint(rct_window *w, rct_drawpixelinfo *dpi)
 	if (g_editor_step == EDITOR_STEP_OBJECT_SELECTION) {
 		drawNextButton = true;
 	}
-	else if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) {
+	else if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) {
 		drawPreviousButton = true;
 	}
 	else if (RCT2_GLOBAL(0x13573C8, uint16) != 0x2710) {
@@ -423,7 +423,7 @@ void window_editor_bottom_toolbar_paint(rct_window *w, rct_drawpixelinfo *dpi)
 		drawPreviousButton = true;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 		if (drawPreviousButton) {
 			gfx_fill_rect(dpi,
 				window_editor_bottom_toolbar_widgets[WIDX_PREVIOUS_IMAGE].left + w->x,
@@ -443,7 +443,7 @@ void window_editor_bottom_toolbar_paint(rct_window *w, rct_drawpixelinfo *dpi)
 
 	window_draw_widgets(w, dpi);
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 
 
 		if (drawPreviousButton) {
@@ -488,7 +488,7 @@ void window_editor_bottom_toolbar_paint(rct_window *w, rct_drawpixelinfo *dpi)
 			short textY = window_editor_bottom_toolbar_widgets[WIDX_PREVIOUS_IMAGE].top + 6 + w->y;
 
 			short stringId = STR_OBJECT_SELECTION_STEP + g_editor_step - 1;
-			if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+			if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 				stringId = STR_OBJECT_SELECTION_STEP;
 
 			gfx_draw_string_centred(dpi, STR_BACK_TO_PREVIOUS_STEP, textX, textY, textColour, 0);
@@ -513,7 +513,7 @@ void window_editor_bottom_toolbar_paint(rct_window *w, rct_drawpixelinfo *dpi)
 			short textY = window_editor_bottom_toolbar_widgets[WIDX_NEXT_IMAGE].top + 6 + w->y;
 
 			short stringId = STR_OBJECT_SELECTION_STEP + g_editor_step + 1;
-			if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+			if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 				stringId = STR_ROLLERCOASTER_DESIGNER_STEP;
 
 			gfx_draw_string_centred(dpi, STR_FORWARD_TO_NEXT_STEP, textX, textY, textColour, 0);
diff --git a/src/windows/editor_inventions_list.c b/src/windows/editor_inventions_list.c
index c35aee7efd..17dd0458a3 100644
--- a/src/windows/editor_inventions_list.c
+++ b/src/windows/editor_inventions_list.c
@@ -561,7 +561,7 @@ static void window_editor_inventions_list_close(rct_window *w)
 	research_remove_flags();
 
 	// When used in-game (as a cheat)
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_EDITOR)) {
 		gSilentResearch = true;
 		sub_684AC3();
 		gSilentResearch = false;
@@ -725,7 +725,7 @@ static void window_editor_inventions_list_invalidate(rct_window *w)
 	w->pressed_widgets |= 1 << WIDX_TAB_1;
 
 	w->widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 }
 
 /**
diff --git a/src/windows/editor_object_selection.c b/src/windows/editor_object_selection.c
index ffe04574cd..f5aea645e5 100644
--- a/src/windows/editor_object_selection.c
+++ b/src/windows/editor_object_selection.c
@@ -690,22 +690,22 @@ static int sub_6AB211(){
 		installedObject = object_get_next(installedObject);
 	}
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER){
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER){
 		setup_track_designer_objects();
 	}
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER){
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER){
 		setup_track_manager_objects();
 	}
 
 	setup_in_use_selection_flags();
 	reset_selected_object_count_and_size();
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))){
+	if (!(gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))){
 		window_editor_object_selection_select_required_objects();
 
 		// To prevent it breaking in scenario mode.
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+		if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 			window_editor_object_selection_select_default_objects();
 	}
 
@@ -767,7 +767,7 @@ void unload_unselected_objects(){
  */
 static void window_editor_object_selection_close(rct_window *w)
 {
-	//if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR))
+	//if (!(gScreenFlags & SCREEN_FLAGS_EDITOR))
 	//	return;
 
 	unload_unselected_objects();
@@ -776,7 +776,7 @@ static void window_editor_object_selection_close(rct_window *w)
 	object_free_scenario_text();
 	editor_object_flags_free();
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR) {
+	if (gScreenFlags & SCREEN_FLAGS_EDITOR) {
 		research_populate_list_random();
 	}
 	else {
@@ -801,7 +801,7 @@ static void window_editor_object_selection_mouseup(rct_window *w, int widgetInde
 {
 	switch (widgetIndex) {
 	case WIDX_CLOSE:
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR) {
+		if (gScreenFlags & SCREEN_FLAGS_EDITOR) {
 			game_do_command(0, 1, 0, 0, GAME_COMMAND_LOAD_OR_QUIT, 1, 0);
 		}
 		else {
@@ -993,7 +993,7 @@ static void window_editor_object_selection_scroll_mousedown(rct_window *w, int s
 	audio_play_sound_panned(SOUND_CLICK_1, RCT2_GLOBAL(0x142406C,uint32), 0, 0, 0);
 
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		if (!window_editor_object_selection_select_object(0, 1, installed_entry))
 			return;
 
@@ -1122,10 +1122,10 @@ static void window_editor_object_selection_invalidate(rct_window *w)
 
 	// Set window title and buttons
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMON_FORMAT_ARGS, rct_string_id) = STR_OBJECT_SELECTION_RIDE_VEHICLES_ATTRACTIONS + w->selected_tab;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		w->widgets[WIDX_TITLE].image = STR_TRACK_DESIGNS_MANAGER_SELECT_RIDE_TYPE;
 		w->widgets[WIDX_INSTALL_TRACK].type = WWT_DROPDOWN_BUTTON;
-	} else if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) {
+	} else if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) {
 		w->widgets[WIDX_TITLE].image = STR_ROLLER_COASTER_DESIGNER_SELECT_RIDE_TYPES_VEHICLES;
 		w->widgets[WIDX_INSTALL_TRACK].type = WWT_EMPTY;
 	} else {
@@ -1148,7 +1148,7 @@ static void window_editor_object_selection_invalidate(rct_window *w)
 		}
 	}
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_MANAGER | SCREEN_FLAGS_TRACK_DESIGNER)) {
+	if (gScreenFlags & (SCREEN_FLAGS_TRACK_MANAGER | SCREEN_FLAGS_TRACK_DESIGNER)) {
 		w->widgets[WIDX_ADVANCED].type = WWT_EMPTY;
 		for (i = 1; i < WINDOW_OBJECT_SELECTION_PAGE_COUNT; i++)
 			w->widgets[WIDX_TAB_1 + i].type = WWT_EMPTY;
@@ -1287,13 +1287,13 @@ static void window_editor_object_selection_paint(rct_window *w, rct_drawpixelinf
 	);
 
 	// Draw number of selected items
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 		x = w->x + 3;
 		y = w->y + w->height - 13;
 
 		numSelected = RCT2_ADDRESS(0x00F433F7, uint16)[w->selected_tab];
 		totalSelectable = object_entry_group_counts[w->selected_tab];
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+		if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 			totalSelectable = 4;
 
 		RCT2_GLOBAL(RCT2_ADDRESS_COMMON_FORMAT_ARGS + 0, uint16) = numSelected;
@@ -1365,7 +1365,7 @@ static void window_editor_object_selection_paint(rct_window *w, rct_drawpixelinf
 
 	stringId = 3165;
 	stringBuffer = (char*)language_get_string(3165) + 1;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
 		// Skip name
 		do {
 			text++;
@@ -1457,7 +1457,7 @@ static void window_editor_object_selection_scrollpaint(rct_window *w, rct_drawpi
 
 		if (y + 12 >= dpi->y && y <= dpi->y + dpi->height) {
 			// Draw checkbox
-			if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) && !(*listItem->flags & 0x20))
+			if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) && !(*listItem->flags & 0x20))
 				gfx_fill_rect_inset(dpi, 2, y, 11, y + 10, w->colours[1], 0xE0);
 
 			// Highlight background
@@ -1468,7 +1468,7 @@ static void window_editor_object_selection_scrollpaint(rct_window *w, rct_drawpi
 			}
 
 			// Draw checkmark
-			if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) && (*listItem->flags & OBJECT_SELECTION_FLAG_SELECTED)) {
+			if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) && (*listItem->flags & OBJECT_SELECTION_FLAG_SELECTED)) {
 				x = 2;
 				RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_FONT_SPRITE_BASE, sint16) = colour == 14 ? -2 : -1;
 				colour2 = w->colours[1] & 0x7F;
@@ -1478,7 +1478,7 @@ static void window_editor_object_selection_scrollpaint(rct_window *w, rct_drawpi
 				gfx_draw_string(dpi, (char*)CheckBoxMarkString, colour2, x, y);
 			}
 
-			x = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 15;
+			x = gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 15;
 
 			char *bufferWithColour = (char*)RCT2_ADDRESS_COMMON_STRING_FORMAT_BUFFER;
 			char *buffer = utf8_write_codepoint(bufferWithColour, colour);
@@ -1500,7 +1500,7 @@ static void window_editor_object_selection_scrollpaint(rct_window *w, rct_drawpi
 
 			// Draw text
 			strcpy(buffer, object_get_name(listItem->entry));
-			if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+			if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 				while (*buffer != 0 && *buffer != 9)
 					buffer++;
 
@@ -1831,7 +1831,7 @@ static int window_editor_object_selection_select_object(uint8 bh, int flags, rct
 
 		uint8 object_type = installedObject->flags & 0xF;
 		uint16 no_objects = object_entry_group_counts[object_type];
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER){
+		if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER){
 			no_objects = 4;
 		}
 
diff --git a/src/windows/editor_objective_options.c b/src/windows/editor_objective_options.c
index c0b2f7385f..da0e0fe2a6 100644
--- a/src/windows/editor_objective_options.c
+++ b/src/windows/editor_objective_options.c
@@ -868,7 +868,7 @@ static void window_editor_objective_options_main_invalidate(rct_window *w)
 	}
 
 	window_editor_objective_options_main_widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 
 	window_editor_objective_options_anchor_border_widgets(w);
 }
@@ -1161,7 +1161,7 @@ static void window_editor_objective_options_rides_invalidate(rct_window *w)
 	window_editor_objective_options_set_pressed_tab(w);
 
 	window_editor_objective_options_main_widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 
 	window_editor_objective_options_anchor_border_widgets(w);
 }
diff --git a/src/windows/editor_scenario_options.c b/src/windows/editor_scenario_options.c
index d79d3abe1d..62345408e7 100644
--- a/src/windows/editor_scenario_options.c
+++ b/src/windows/editor_scenario_options.c
@@ -444,7 +444,7 @@ static void window_editor_scenario_options_financial_mouseup(rct_window *w, int
 		window_editor_scenario_options_set_page(w, widgetIndex - WIDX_TAB_1);
 		break;
 	case WIDX_NO_MONEY:
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+		if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 			gParkFlags ^= PARK_FLAGS_NO_MONEY_SCENARIO;
 		} else {
 			gParkFlags ^= PARK_FLAGS_NO_MONEY;
@@ -567,7 +567,7 @@ static void window_editor_scenario_options_financial_mousedown(int widgetIndex,
 		break;
 	}
 
-	if(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) == SCREEN_FLAGS_PLAYING) {
+	if(gScreenFlags == SCREEN_FLAGS_PLAYING) {
 		window_invalidate_by_class(WC_FINANCES);
 		window_invalidate_by_class(WC_BOTTOM_TOOLBAR);
 	}
@@ -603,8 +603,8 @@ static void window_editor_scenario_options_financial_invalidate(rct_window *w)
 
 	window_editor_scenario_options_set_pressed_tab(w);
 
-	if (((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
-		(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
+	if (((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
+		(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
 		w->pressed_widgets |= (1 << WIDX_NO_MONEY);
 		for (i = WIDX_INITIAL_CASH; i <= WIDX_FORBID_MARKETING; i++)
 			w->widgets[i].type = WWT_EMPTY;
@@ -631,7 +631,7 @@ static void window_editor_scenario_options_financial_invalidate(rct_window *w)
 		w->pressed_widgets &= ~(1 << WIDX_FORBID_MARKETING);
 
 	w->widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 
 	window_editor_scenario_options_anchor_border_widgets(w);
 }
@@ -832,8 +832,8 @@ static void window_editor_scenario_options_guests_invalidate(rct_window *w)
 
 	window_editor_scenario_options_set_pressed_tab(w);
 
-	if (((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
-		(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
+	if (((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
+		(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
 		w->widgets[WIDX_CASH_PER_GUEST].type = WWT_EMPTY;
 		w->widgets[WIDX_CASH_PER_GUEST_INCREASE].type = WWT_EMPTY;
 		w->widgets[WIDX_CASH_PER_GUEST_DECREASE].type = WWT_EMPTY;
@@ -856,7 +856,7 @@ static void window_editor_scenario_options_guests_invalidate(rct_window *w)
 		w->pressed_widgets &= ~(1 << WIDX_GUEST_PREFER_MORE_INTENSE_RIDES);
 
 	w->widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 
 	window_editor_scenario_options_anchor_border_widgets(w);
 }
@@ -1057,7 +1057,7 @@ static void window_editor_scenario_options_park_mousedown(int widgetIndex, rct_w
 static void window_editor_scenario_options_park_dropdown(rct_window *w, int widgetIndex, int dropdownIndex)
 {
 	if (widgetIndex == WIDX_PAY_FOR_PARK_OR_RIDES_DROPDOWN && dropdownIndex != -1) {
-		if(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+		if(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 			if (dropdownIndex == 0) {
 				if (!(gParkFlags & PARK_FLAGS_PARK_FREE_ENTRY)) {
 					gParkFlags |= PARK_FLAGS_PARK_FREE_ENTRY;
@@ -1118,8 +1118,8 @@ static void window_editor_scenario_options_park_invalidate(rct_window *w)
 
 	window_editor_scenario_options_set_pressed_tab(w);
 
-	if (((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
-		(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
+	if (((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY_SCENARIO)) ||
+		(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && (gParkFlags & PARK_FLAGS_NO_MONEY))) {
 		for (i = WIDX_LAND_COST; i <= WIDX_ENTRY_PRICE_DECREASE; i++)
 			w->widgets[i].type = WWT_EMPTY;
 	} else {
@@ -1165,7 +1165,7 @@ static void window_editor_scenario_options_park_invalidate(rct_window *w)
 	w->pressed_widgets = pressedWidgets;
 
 	w->widgets[WIDX_CLOSE].type =
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
+		gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR ? WWT_EMPTY : WWT_CLOSEBOX;
 
 	window_editor_scenario_options_anchor_border_widgets(w);
 }
diff --git a/src/windows/footpath.c b/src/windows/footpath.c
index aedb4844fd..fcfab76247 100644
--- a/src/windows/footpath.c
+++ b/src/windows/footpath.c
@@ -345,7 +345,7 @@ static void window_footpath_dropdown(rct_window *w, int widgetIndex, int dropdow
 		pathId = gFootpathSelectedId;
 	} else {
 		int flags = 4;
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode)
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode)
 			flags = 0;
 
 		j = 0;
@@ -534,7 +534,7 @@ static void window_footpath_invalidate(rct_window *w)
 	}
 
 	// Disable queue line button if in Scenario Editor
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR)
+	if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR)
 		window_footpath_widgets[WIDX_QUEUELINE_TYPE].type = WWT_EMPTY;
 }
 
@@ -595,7 +595,7 @@ static void window_footpath_show_footpath_types_dialog(rct_window *w, rct_widget
 	numPathTypes = 0;
 	flags = 4;
 	// If the game is in sandbox mode, also show paths that are normally restricted to the scenario editor, but not their queues (since these usually shouldn't have one)
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || (gCheatsSandboxMode && !showQueues))
+	if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || (gCheatsSandboxMode && !showQueues))
 		flags = 0;
 
 	for (i = 0; i < 16; i++) {
diff --git a/src/windows/install_track.c b/src/windows/install_track.c
index 4d8de9e091..907b467232 100644
--- a/src/windows/install_track.c
+++ b/src/windows/install_track.c
@@ -158,7 +158,7 @@ static void window_install_track_select(rct_window *w, int index)
 	w->track_list.var_480 = index;
 
 	audio_play_sound_panned(SOUND_CLICK_1, w->x + (w->width / 2), 0, 0, 0);
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) && index == 0) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) && index == 0) {
 		window_close(w);
 		ride_construct_new(_window_install_track_item);
 		return;
@@ -167,7 +167,7 @@ static void window_install_track_select(rct_window *w, int index)
 	if (RCT2_GLOBAL(0x00F44153, uint8) != 0)
 		RCT2_GLOBAL(RCT2_ADDRESS_TRACK_DESIGN_SCENERY_TOGGLE, uint8) = 1;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER))
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER))
 		index--;
 
 	trackDesignItem = trackDesignList + (index * 128);
@@ -176,7 +176,7 @@ static void window_install_track_select(rct_window *w, int index)
 	window_track_list_format_name(
 		(char*)0x009BC313,
 		trackDesignItem,
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER ?
+		gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER ?
 		0 :
 		FORMAT_WHITE,
 		1);
@@ -184,7 +184,7 @@ static void window_install_track_select(rct_window *w, int index)
 	char track_path[MAX_PATH] = { 0 };
 	substitute_path(track_path, (char*)RCT2_ADDRESS_TRACKS_PATH, trackDesignItem);
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		window_track_manage_open();
 		return;
 	}
diff --git a/src/windows/map.c b/src/windows/map.c
index d388bf0273..8f280227ff 100644
--- a/src/windows/map.c
+++ b/src/windows/map.c
@@ -693,7 +693,7 @@ static void window_map_invalidate(rct_window *w)
 	w->widgets[WIDX_CLOSE].right = w->width - 2 - 11 + 10;
 	w->widgets[WIDX_MAP].right = w->width - 4;
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode)
+	if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode)
 		w->widgets[WIDX_MAP].bottom = w->height - 1 - 72;
 	else if (w->selected_tab == PAGE_RIDES)
 		w->widgets[WIDX_MAP].bottom = w->height - 1 - 44;
@@ -737,7 +737,7 @@ static void window_map_invalidate(rct_window *w)
 		w->widgets[i].type = WWT_EMPTY;
 	}
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) {
+	if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) {
 		// scenario editor: build park entrance selected, show rotate button
 		if (
 			(gInputFlags & INPUT_FLAG_TOOL_ACTIVE) &&
@@ -804,7 +804,7 @@ static void window_map_paint(rct_window *w, rct_drawpixelinfo *dpi)
 		gfx_draw_sprite(dpi, 0x0B6E0190A, x, y, 0);
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
 		// Render the map legend
 		if (w->selected_tab == PAGE_RIDES) {
 			x = w->x + 4;
@@ -1293,7 +1293,7 @@ static void window_map_place_park_entrance_tool_down(int x, int y)
 		SOUND_PLACE_ITEM,
 		RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Z, uint16),
 		RCT2_GLOBAL(0x009DEA64, uint16),
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16)
+		gScreenAge
 	);
 }
 
diff --git a/src/windows/new_ride.c b/src/windows/new_ride.c
index 01ec197e60..8fe93770f6 100644
--- a/src/windows/new_ride.c
+++ b/src/windows/new_ride.c
@@ -263,7 +263,7 @@ static bool _trackSelectionByType;
 */
 void window_new_ride_init_vars() {
 	// If we are in the track designer, default to the Roller Coaster tab
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) {
 		RCT2_GLOBAL(RCT2_ADDRESS_WINDOW_RIDE_LIST_SELECTED_TAB, uint8) = WINDOW_NEW_RIDE_PAGE_ROLLER_COASTER;
 	}
 	else {
@@ -741,7 +741,7 @@ static void window_new_ride_invalidate(rct_window *w)
 
 	window_new_ride_widgets[WIDX_TITLE].image = STR_NEW_TRANSPORT_RIDES + _window_new_ride_current_tab;
 	window_new_ride_widgets[WIDX_TAB_7].type = WWT_TAB;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 4)
+	if (gScreenFlags & 4)
 		window_new_ride_widgets[WIDX_TAB_7].type = WWT_EMPTY;
 
 	if (_window_new_ride_current_tab == WINDOW_NEW_RIDE_PAGE_RESEARCH) {
diff --git a/src/windows/ride.c b/src/windows/ride.c
index 07bd14263c..c7756ae272 100644
--- a/src/windows/ride.c
+++ b/src/windows/ride.c
@@ -1164,7 +1164,7 @@ void window_ride_disable_tabs(rct_window *w)
 		(gParkFlags & PARK_FLAGS_NO_MONEY) != 0)
 		disabled_tabs |= (1 << WIDX_TAB_9); // 0x1000
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint32) & SCREEN_FLAGS_TRACK_DESIGNER) != 0)
+	if ((gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER) != 0)
 		disabled_tabs |= (1 << WIDX_TAB_4 | 1 << WIDX_TAB_6 | 1 << WIDX_TAB_9 | 1 << WIDX_TAB_10); // 0x3280
 
 	rct_ride_entry *type = get_ride_entry(ride->subtype);
@@ -4808,7 +4808,7 @@ static void window_ride_measurements_mousedown(int widgetIndex, rct_window *w, r
 		2
 	);
 	gDropdownDefaultIndex = 0;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 		gDropdownItemsDisabled |= 2;
 }
 
diff --git a/src/windows/save_prompt.c b/src/windows/save_prompt.c
index 68f84e85db..8b77790b3a 100644
--- a/src/windows/save_prompt.c
+++ b/src/windows/save_prompt.c
@@ -112,16 +112,16 @@ void window_save_prompt_open()
 {
 	int stringId, width, height;
 	rct_window* window;
-	unsigned short prompt_mode;
+	uint8 prompt_mode;
 	rct_widget *widgets;
 	uint64 enabled_widgets;
 
-	prompt_mode = RCT2_GLOBAL(RCT2_ADDRESS_SAVE_PROMPT_MODE, uint16);
+	prompt_mode = gSavePromptMode;
 	if (prompt_mode == PM_QUIT)
 		prompt_mode = PM_SAVE_BEFORE_QUIT;
 
 	// do not show save prompt if we're in the title demo and click on load game
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) {
+	if (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) {
 		game_load_or_quit_no_save_prompt();
 		return;
 	}
@@ -133,7 +133,7 @@ void window_save_prompt_open()
 		* and game_load_or_quit() are not called by the original binary anymore.
 		*/
 
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_AGE, uint16) < 3840) {
+		if (gScreenAge < 3840) {
 			game_load_or_quit_no_save_prompt();
 			return;
 		}
@@ -145,7 +145,7 @@ void window_save_prompt_open()
 		window_close(window);
 	}
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
 		widgets = window_quit_prompt_widgets;
 		enabled_widgets =
 			(1 << WQIDX_CLOSE) |
@@ -182,9 +182,9 @@ void window_save_prompt_open()
 	window_invalidate_by_class(WC_TOP_TOOLBAR);
 
 	stringId = prompt_mode + STR_LOAD_GAME_PROMPT_TITLE;
-	if (stringId == STR_LOAD_GAME_PROMPT_TITLE && RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 2)
+	if (stringId == STR_LOAD_GAME_PROMPT_TITLE && gScreenFlags & 2)
 		stringId = STR_LOAD_LANDSCAPE_PROMPT_TITLE;
-	if (stringId == STR_QUIT_GAME_PROMPT_TITLE && RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 2)
+	if (stringId == STR_QUIT_GAME_PROMPT_TITLE && gScreenFlags & 2)
 		stringId = STR_QUIT_SCENARIO_EDITOR;
 	window_save_prompt_widgets[WIDX_TITLE].image = stringId;
 	window_save_prompt_widgets[WIDX_LABEL].image = prompt_mode + STR_SAVE_BEFORE_LOADING;
@@ -208,7 +208,7 @@ static void window_save_prompt_close(rct_window *w)
  */
 static void window_save_prompt_mouseup(rct_window *w, int widgetIndex)
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (gScreenFlags & (SCREEN_FLAGS_TITLE_DEMO | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
 		switch (widgetIndex) {
 		case WQIDX_OK:
 			game_load_or_quit_no_save_prompt();
diff --git a/src/windows/title_command_editor.c b/src/windows/title_command_editor.c
index 012bc545fe..1874c47db3 100644
--- a/src/windows/title_command_editor.c
+++ b/src/windows/title_command_editor.c
@@ -521,7 +521,7 @@ static void window_title_command_editor_invalidate(rct_window *w)
 		break;
 	}
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO)
+	if ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO)
 		w->disabled_widgets |= (1 << WIDX_GET);
 	else
 		w->disabled_widgets &= ~(1 << WIDX_GET);
diff --git a/src/windows/title_editor.c b/src/windows/title_editor.c
index d7aa42bc68..22def7c0e4 100644
--- a/src/windows/title_editor.c
+++ b/src/windows/title_editor.c
@@ -304,8 +304,8 @@ static void window_title_editor_mouseup(rct_window *w, int widgetIndex)
 	int defaultPreset, playing, inTitle, i, commandEditorOpen;
 
 	defaultPreset = (gCurrentTitleSequence < TITLE_SEQUENCE_DEFAULT_PRESETS);
-	playing = (gCurrentTitleSequence == gCurrentPreviewTitleSequence) && ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
-	inTitle = ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
+	playing = (gCurrentTitleSequence == gCurrentPreviewTitleSequence) && ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
+	inTitle = ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
 	commandEditorOpen = (window_find_by_class(WC_TITLE_COMMAND_EDITOR) != NULL);
 	switch (widgetIndex) {
 	case WIDX_TITLE_EDITOR_CLOSE:
@@ -836,8 +836,8 @@ void window_title_editor_invalidate(rct_window *w)
 	int defaultPreset, playing, inTitle;
 
 	defaultPreset = (gCurrentTitleSequence < TITLE_SEQUENCE_DEFAULT_PRESETS);
-	playing = (gCurrentTitleSequence == gCurrentPreviewTitleSequence) && ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
-	inTitle = ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
+	playing = (gCurrentTitleSequence == gCurrentPreviewTitleSequence) && ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
+	inTitle = ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
 
 	if (!inTitle)
 		w->disabled_widgets |= (1 << WIDX_TITLE_EDITOR_PLAY);
@@ -891,7 +891,7 @@ void window_title_editor_scrollpaint(rct_window *w, rct_drawpixelinfo *dpi, int
 
 	title_sequence *title = &gConfigTitleSequences.presets[gCurrentTitleSequence];
 
-	inTitle = ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
+	inTitle = ((gScreenFlags & SCREEN_FLAGS_TITLE_DEMO) == SCREEN_FLAGS_TITLE_DEMO);
 	y = 0; x = 0; x2 = 0; width = 0;
 	width = w->widgets[WIDX_TITLE_EDITOR_LIST].right - w->widgets[WIDX_TITLE_EDITOR_LIST].left;
 	if (w->selected_tab == WINDOW_TITLE_EDITOR_TAB_SAVES) {
diff --git a/src/windows/top_toolbar.c b/src/windows/top_toolbar.c
index a477c19f1f..28853cf98c 100644
--- a/src/windows/top_toolbar.c
+++ b/src/windows/top_toolbar.c
@@ -367,7 +367,7 @@ static void window_top_toolbar_mousedown(int widgetIndex, rct_window*w, rct_widg
 	switch (widgetIndex) {
 	case WIDX_FILE_MENU:
 		_menuDropdownIncludesTwitch = false;
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
+		if (gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
 			gDropdownItemsFormat[0] = STR_ABOUT;
 			gDropdownItemsFormat[1] = STR_OPTIONS;
 			gDropdownItemsFormat[2] = STR_SCREENSHOT;
@@ -376,11 +376,11 @@ static void window_top_toolbar_mousedown(int widgetIndex, rct_window*w, rct_widg
 			gDropdownItemsFormat[5] = STR_QUIT_TRACK_DESIGNS_MANAGER;
 			gDropdownItemsFormat[6] = STR_EXIT_OPENRCT2;
 
-			if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_DESIGNER)
+			if (gScreenFlags & SCREEN_FLAGS_TRACK_DESIGNER)
 				gDropdownItemsFormat[5] = STR_QUIT_ROLLERCOASTER_DESIGNER;
 
 			numItems = 7;
-		} else if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+		} else if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 			gDropdownItemsFormat[0] = STR_LOAD_LANDSCAPE;
 			gDropdownItemsFormat[1] = STR_SAVE_LANDSCAPE;
 			gDropdownItemsFormat[2] = 0;
@@ -469,7 +469,7 @@ static void window_top_toolbar_mousedown(int widgetIndex, rct_window*w, rct_widg
 		gDropdownItemsFormat[1] = 2780;
 		numItems = 2;
 
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && g_editor_step == EDITOR_STEP_LANDSCAPE_EDITOR) {
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && g_editor_step == EDITOR_STEP_LANDSCAPE_EDITOR) {
 			gDropdownItemsFormat[2] = 2690;
 			numItems++;
 		}
@@ -516,15 +516,15 @@ static void window_top_toolbar_dropdown(rct_window *w, int widgetIndex, int drop
 	case WIDX_FILE_MENU:
 
 		// New game is only available in the normal game. Skip one position to avoid incorrect mappings in the menus of the other modes.
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR))
+		if (gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR))
 			dropdownIndex += 1;
 		
 		// Quicksave is only available in the normal game. Skip one position to avoid incorrect mappings in the menus of the other modes.
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR) && dropdownIndex > DDIDX_LOAD_GAME)
+		if (gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR) && dropdownIndex > DDIDX_LOAD_GAME)
 			dropdownIndex += 1;
 
 		// Track designer and track designs manager start with About, not Load/save
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))
+		if (gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))
 			dropdownIndex += DDIDX_ABOUT;
 
 		switch (dropdownIndex) {
@@ -539,7 +539,7 @@ static void window_top_toolbar_dropdown(rct_window *w, int widgetIndex, int drop
 			save_game();
 			break;
 		case DDIDX_SAVE_GAME_AS:
-			if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) {
+			if (gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) {
 				rct_s6_info *s6Info = (rct_s6_info*)0x0141F570;
 				window_loadsave_open(LOADSAVETYPE_SAVE | LOADSAVETYPE_LANDSCAPE, s6Info->name);
 			}
@@ -659,7 +659,7 @@ static void window_top_toolbar_invalidate(rct_window *w)
 	window_top_toolbar_widgets[WIDX_NEWS].type = WWT_TRNBTN;
 	window_top_toolbar_widgets[WIDX_NETWORK].type = WWT_TRNBTN;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (gScreenFlags & (SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER)) {
 		window_top_toolbar_widgets[WIDX_PAUSE].type = WWT_EMPTY;
 		window_top_toolbar_widgets[WIDX_RIDES].type = WWT_EMPTY;
 		window_top_toolbar_widgets[WIDX_PARK].type = WWT_EMPTY;
diff --git a/src/windows/track_list.c b/src/windows/track_list.c
index 01185a8746..96053c9cc4 100644
--- a/src/windows/track_list.c
+++ b/src/windows/track_list.c
@@ -120,7 +120,7 @@ void window_track_list_open(ride_list_item item)
 	RCT2_GLOBAL(RCT2_ADDRESS_TRACK_DESIGN_CACHE, void*) = mem;
 	reset_track_list_cache();
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		x = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_WIDTH, uint16) / 2 - 300;
 		y = max(28, RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_HEIGHT, uint16) / 2 - 200);
 	} else {
@@ -140,7 +140,7 @@ void window_track_list_open(ride_list_item item)
 	w->enabled_widgets = (1 << WIDX_CLOSE) | (1 << WIDX_ROTATE) | (1 << WIDX_TOGGLE_SCENERY) | (1 << WIDX_BACK);
 	window_init_scroll_widgets(w);
 	w->track_list.var_480 = 0xFFFF;
-	w->track_list.var_482 = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 1;
+	w->track_list.var_482 = gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 1;
 	w->track_list.var_484 = 0;
 	RCT2_GLOBAL(RCT2_ADDRESS_TRACK_DESIGN_SCENERY_TOGGLE, uint8) = 0;
 	window_push_others_right(w);
@@ -159,7 +159,7 @@ static void window_track_list_select(rct_window *w, int index)
 	w->track_list.var_480 = index;
 
 	audio_play_sound_panned(SOUND_CLICK_1, w->x + (w->width / 2), 0, 0, 0);
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) && index == 0) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) && index == 0) {
 		window_close(w);
 		ride_construct_new(_window_track_list_item);
 		return;
@@ -168,7 +168,7 @@ static void window_track_list_select(rct_window *w, int index)
 	if (RCT2_GLOBAL(0x00F44153, uint8) != 0)
 		RCT2_GLOBAL(RCT2_ADDRESS_TRACK_DESIGN_SCENERY_TOGGLE, uint8) = 1;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER))
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER))
 		index--;
 
 	trackDesignItem = trackDesignList + (index * 128);
@@ -177,7 +177,7 @@ static void window_track_list_select(rct_window *w, int index)
 	window_track_list_format_name(
 		(char*)0x009BC313,
 		trackDesignItem,
-		RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER ?
+		gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER ?
 		0 :
 		FORMAT_WHITE,
 		1);
@@ -185,7 +185,7 @@ static void window_track_list_select(rct_window *w, int index)
 	char track_path[MAX_PATH] = { 0 };
 	substitute_path(track_path, (char*)RCT2_ADDRESS_TRACKS_PATH, trackDesignItem);
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		window_track_manage_open();
 		return;
 	}
@@ -211,7 +211,7 @@ static int window_track_list_get_list_item_index_from_position(int x, int y)
 	uint8 *trackDesignItem, *trackDesignList = RCT2_ADDRESS(RCT2_ADDRESS_TRACK_LIST, uint8);
 
 	index = 0;
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if (!(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 		y -= 10;
 		if (y < 0)
 			return index;
@@ -246,7 +246,7 @@ static void window_track_list_mouseup(rct_window *w, int widgetIndex)
 	switch (widgetIndex) {
 	case WIDX_CLOSE:
 		window_close(w);
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+		if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 			window_close_by_number(WC_MANAGE_TRACK_DESIGN, w->number);
 			window_close_by_number(WC_TRACK_DELETE_PROMPT, w->number);
 			trackmanager_load();
@@ -264,7 +264,7 @@ static void window_track_list_mouseup(rct_window *w, int widgetIndex)
 		break;
 	case WIDX_BACK:
 		window_close(w);
-		if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+		if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 			window_close_by_number(WC_MANAGE_TRACK_DESIGN, w->number);
 			window_close_by_number(WC_TRACK_DELETE_PROMPT, w->number);
 			trackmanager_load();
@@ -283,7 +283,7 @@ static void window_track_list_scrollgetsize(rct_window *w, int scrollIndex, int
 {
 	uint8 *trackDesignItem, *trackDesignList = RCT2_ADDRESS(RCT2_ADDRESS_TRACK_LIST, uint8);
 
-	*height = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 10;
+	*height = gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER ? 0 : 10;
 	for (trackDesignItem = trackDesignList; *trackDesignItem != 0; trackDesignItem += 128)
 		*height += 10;
 }
@@ -349,7 +349,7 @@ static void window_track_list_invalidate(rct_window *w)
 		stringId = _window_track_list_item.type + 2;
 
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMON_FORMAT_ARGS, uint16) = stringId;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		window_track_list_widgets[WIDX_TITLE].image = STR_TRACK_DESIGNS;
 		window_track_list_widgets[WIDX_TRACK_LIST].tooltip = STR_CLICK_ON_DESIGN_TO_RENAME_OR_DELETE_IT;
 	} else {
@@ -357,7 +357,7 @@ static void window_track_list_invalidate(rct_window *w)
 		window_track_list_widgets[WIDX_TRACK_LIST].tooltip = STR_CLICK_ON_DESIGN_TO_BUILD_IT_TIP;
 	}
 
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) || w->track_list.var_482 != 0) {
+	if ((gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) || w->track_list.var_482 != 0) {
 		w->pressed_widgets |= 1 << WIDX_TRACK_PREVIEW;
 		w->disabled_widgets &= ~(1 << WIDX_TRACK_PREVIEW);
 		window_track_list_widgets[WIDX_ROTATE].type = WWT_FLATBTN;
@@ -392,7 +392,7 @@ static void window_track_list_paint(rct_window *w, rct_drawpixelinfo *dpi)
 	window_draw_widgets(w, dpi);
 
 	trackIndex = w->track_list.var_482;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		if (*trackDesignList == 0 || trackIndex == -1)
 			return;
 	} else if (trackIndex-- == 0) {
@@ -428,7 +428,7 @@ static void window_track_list_paint(rct_window *w, rct_drawpixelinfo *dpi)
 
 	RCT2_GLOBAL(0x00F44153, uint8) = 0;
 	// Warnings
-	if ((track_td6->track_flags & 4) && !(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER)) {
+	if ((track_td6->track_flags & 4) && !(gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER)) {
 		// Vehicle design not available
 		gfx_draw_string_centred_clipped(dpi, STR_VEHICLE_DESIGN_UNAVAILABLE, NULL, 0, x, y, 368);
 		y -= 10;
@@ -571,7 +571,7 @@ static void window_track_list_scrollpaint(rct_window *w, rct_drawpixelinfo *dpi,
 	y = 0;
 
 	trackDesignItem = trackDesignList;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TRACK_MANAGER) {
+	if (gScreenFlags & SCREEN_FLAGS_TRACK_MANAGER) {
 		if (*trackDesignItem == 0) {
 			// No track designs
 			gfx_draw_string_left(dpi, STR_NO_TRACK_DESIGNS_OF_THIS_TYPE, NULL, 0, x, y - 1);
diff --git a/src/world/climate.c b/src/world/climate.c
index 23a98863c6..8d1101eb66 100644
--- a/src/world/climate.c
+++ b/src/world/climate.c
@@ -112,7 +112,7 @@ sint8 step_weather_level(sint8 cur_weather_level, sint8 next_weather_level) {
  */
 void climate_update()
 {
-	uint8 screen_flags = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8);
+	uint8 screen_flags = gScreenFlags;
 	sint8 temperature = gClimateCurrentTemperature,
 		target_temperature = gClimateNextTemperature,
 		cur_gloom = gClimateCurrentWeatherGloom,
@@ -225,7 +225,7 @@ void climate_update_sound()
 		return;
 	if (!gConfigSound.sound_enabled)
 		return;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_TITLE_DEMO)
+	if (gScreenFlags & SCREEN_FLAGS_TITLE_DEMO)
 		return;
 
 	climate_update_rain_sound();
diff --git a/src/world/footpath.c b/src/world/footpath.c
index 6550c196ef..88c4541c93 100644
--- a/src/world/footpath.c
+++ b/src/world/footpath.c
@@ -200,7 +200,7 @@ static money32 footpath_element_insert(int type, int x, int y, int z, int slope,
 		if (!(flags & (1 << 7)))
 			footpath_remove_edges_at(x, y, mapElement);
 
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !(flags & (1 << 6)))
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !(flags & (1 << 6)))
 			automatically_set_peep_spawn(x, y, mapElement->base_height / 2);
 
 		loc_6A6620(flags, x, y, mapElement);
@@ -334,7 +334,7 @@ static money32 footpath_place_real(int type, int x, int y, int z, int slope, int
 		return MONEY32_UNDEFINED;
 	}
 
-	if (!((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
+	if (!((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
 		return MONEY32_UNDEFINED;
 
 	if (slope & 8) {
@@ -405,7 +405,7 @@ money32 footpath_remove_real(int x, int y, int z, int flags)
 		footpath_remove_litter(x, y, z * 8);
 	}
 
-	if (!((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
+	if (!((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
 		return MONEY32_UNDEFINED;
 
 	mapElement = map_get_footpath_element(x / 32, y / 32, z);
@@ -470,7 +470,7 @@ static money32 footpath_place_from_track(int type, int x, int y, int z, int slop
 		return MONEY32_UNDEFINED;
 	}
 
-	if (!((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
+	if (!((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && !map_is_location_owned(x, y, z * 8))
 		return MONEY32_UNDEFINED;
 
 	if (z < 2) {
@@ -1120,7 +1120,7 @@ static void loc_6A6D7E(
 ) {
 	int x = initialX + TileDirectionDelta[direction].x;
 	int y = initialY + TileDirectionDelta[direction].y;
-	if (((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && map_is_edge(x, y)) {
+	if (((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode) && map_is_edge(x, y)) {
 		if (query) {
 			neighbour_list_push(neighbourList, 7, direction, 255);
 		}
diff --git a/src/world/map.c b/src/world/map.c
index 6b25337203..519d1ccd06 100644
--- a/src/world/map.c
+++ b/src/world/map.c
@@ -592,7 +592,7 @@ void map_update_path_wide_flags()
 {
 	int i, x, y;
 
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))
+	if (gScreenFlags & (SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER))
 		return;
 
 	// Presumebly update_path_wide_flags is too computationally expensive to call for every
@@ -731,7 +731,7 @@ void game_command_remove_scenery(int* eax, int* ebx, int* ecx, int* edx, int* es
 		return;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !(flags & GAME_COMMAND_FLAG_GHOST) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !(flags & GAME_COMMAND_FLAG_GHOST) && !gCheatsSandboxMode) {
 		// Check if allowed to remove item
 		if (gParkFlags & PARK_FLAGS_FORBID_TREE_REMOVAL) {
 			if (entry->small_scenery.height > 64) {
@@ -872,7 +872,7 @@ void game_command_remove_large_scenery(int* eax, int* ebx, int* ecx, int* edx, i
 		currentTile.y += firstTile.y;
 		currentTile.z += firstTile.z;
 
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
+		if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
 			if (!map_is_location_owned(currentTile.x, currentTile.y, currentTile.z)){
 				*ebx = MONEY32_UNDEFINED;
 				return;
@@ -959,7 +959,7 @@ void game_command_remove_banner(int* eax, int* ebx, int* ecx, int* edx, int* esi
 		return;
 	}
 
-	if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, z - 16)){
+	if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, z - 16)){
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
@@ -1017,7 +1017,7 @@ void game_command_set_scenery_colour(int* eax, int* ebx, int* ecx, int* edx, int
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Y, uint16) = y + 16;
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Z, uint16) = z;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
 		if (!map_is_location_owned(x, y, z)){
 			*ebx = MONEY32_UNDEFINED;
 			return;
@@ -1069,7 +1069,7 @@ void game_command_set_fence_colour(int* eax, int* ebx, int* ecx, int* edx, int*
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Y, uint16) = y + 16;
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Z, uint16) = z;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) &&
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) &&
 		!map_is_location_in_park(x, y) &&
 		!gCheatsSandboxMode) {
 
@@ -1166,7 +1166,7 @@ void game_command_set_large_scenery_colour(int* eax, int* ebx, int* ecx, int* ed
 		currentTile.y += baseTile.y;
 		currentTile.z += baseTile.z;
 
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
+		if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
 			if (!map_is_location_owned(currentTile.x, currentTile.y, currentTile.z)){
 				*ebx = MONEY32_UNDEFINED;
 				return;
@@ -1209,7 +1209,7 @@ void game_command_set_banner_colour(int* eax, int* ebx, int* ecx, int* edx, int*
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Y, uint16) = y + 16;
 	RCT2_GLOBAL(RCT2_ADDRESS_COMMAND_MAP_Z, uint16) = z;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode){
 		if (!map_is_location_owned(x, y, z - 16)){
 			*ebx = MONEY32_UNDEFINED;
 			return;
@@ -1385,7 +1385,7 @@ money32 map_clear_scenery(int x0, int y0, int x1, int y1, int clear, int flags)
 	totalCost = 0;
 	for (y = y0; y <= y1; y += 32) {
 		for (x = x0; x <= x1; x += 32) {
-			if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode || map_is_location_owned_or_has_rights(x, y)) {
+			if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) || gCheatsSandboxMode || map_is_location_owned_or_has_rights(x, y)) {
 				cost = map_clear_scenery_from_tile(x / 32, y / 32, clear, flags);
 				if (cost != MONEY32_UNDEFINED) {
 					noValidTiles = false;
@@ -1460,7 +1460,7 @@ money32 map_change_surface_style(int x0, int y0, int x1, int y1, uint8 surfaceSt
 		return (gParkFlags & PARK_FLAGS_NO_MONEY) ? 0 : cost;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && gParkFlags & PARK_FLAGS_FORBID_LANDSCAPE_CHANGES) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && gParkFlags & PARK_FLAGS_FORBID_LANDSCAPE_CHANGES) {
 		cost += RCT2_GLOBAL(0x009E32B4, uint32);
 		return (gParkFlags & PARK_FLAGS_NO_MONEY) ? 0 : cost;
 	}
@@ -1470,7 +1470,7 @@ money32 map_change_surface_style(int x0, int y0, int x1, int y1, uint8 surfaceSt
 			if (x > 0x1FFF) continue;
 			if (y > 0x1FFF) continue;
 
-			if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
+			if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
 				if (!map_is_location_in_park(x, y)) continue;
 			}
 
@@ -1605,7 +1605,7 @@ static money32 map_set_land_height(int flags, int x, int y, int height, int styl
 		return MONEY32_UNDEFINED;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
 		if (gParkFlags & PARK_FLAGS_FORBID_LANDSCAPE_CHANGES) {
 			gGameCommandErrorText = STR_FORBIDDEN_BY_THE_LOCAL_AUTHORITY;
 			return MONEY32_UNDEFINED;
@@ -1635,7 +1635,7 @@ static money32 map_set_land_height(int flags, int x, int y, int height, int styl
 		return MONEY32_UNDEFINED;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode) {
 		if (!map_is_location_in_park(x, y)) {
 			return MONEY32_UNDEFINED;
 		}
@@ -2574,7 +2574,7 @@ void game_command_set_water_height(int* eax, int* ebx, int* ecx, int* edx, int*
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
-	if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && gParkFlags & PARK_FLAGS_FORBID_LANDSCAPE_CHANGES){
+	if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && gParkFlags & PARK_FLAGS_FORBID_LANDSCAPE_CHANGES){
 		gGameCommandErrorText = STR_FORBIDDEN_BY_THE_LOCAL_AUTHORITY;
 		*ebx = MONEY32_UNDEFINED;
 		return;
@@ -2598,7 +2598,7 @@ void game_command_set_water_height(int* eax, int* ebx, int* ecx, int* edx, int*
 		return;
 	}
 
-	if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_in_park(x, y)){
+	if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_in_park(x, y)){
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
@@ -2662,7 +2662,7 @@ void game_command_remove_fence(int* eax, int* ebx, int* ecx, int* edx, int* esi,
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
-	if(!(*ebx & 0x40) && !(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, base_height * 8)){
+	if(!(*ebx & 0x40) && !(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, base_height * 8)){
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
@@ -2754,7 +2754,7 @@ void game_command_place_banner(int* eax, int* ebx, int* ecx, int* edx, int* esi,
 		return;
 	}
 
-	if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, base_height * 16)){
+	if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, base_height * 16)){
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
@@ -2944,7 +2944,7 @@ void game_command_place_scenery(int* eax, int* ebx, int* ecx, int* edx, int* esi
 				if(F64EC8 == 0){
 					F64EC8 = base_height2;
 				}
-				if(!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, F64EC8)){
+				if(!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) && !gCheatsSandboxMode && !map_is_location_owned(x, y, F64EC8)){
 					*ebx = MONEY32_UNDEFINED;
 					return;
 				}
@@ -3295,7 +3295,7 @@ void game_command_place_fence(int* eax, int* ebx, int* ecx, int* edx, int* esi,
 		return;
 	}
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) &&
+	if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) &&
 		!(flags & (1 << 7)) && !gCheatsSandboxMode){
 
 		if (position.z == 0){
@@ -3695,7 +3695,7 @@ void game_command_place_large_scenery(int* eax, int* ebx, int* ecx, int* edx, in
 			return;
 		}
 
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) &&
+		if (!(gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) &&
 			!map_is_location_owned(curTile.x, curTile.y, zLow * 8) &&
 			!gCheatsSandboxMode) {
 			*ebx = MONEY32_UNDEFINED;
@@ -4222,7 +4222,7 @@ void map_remove_intersecting_walls(int x, int y, int z0, int z1, int direction)
 void map_update_tiles()
 {
 	int ignoreScreenFlags = SCREEN_FLAGS_SCENARIO_EDITOR | SCREEN_FLAGS_TRACK_DESIGNER | SCREEN_FLAGS_TRACK_MANAGER;
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & ignoreScreenFlags)
+	if (gScreenFlags & ignoreScreenFlags)
 		return;
 
 	// Update 43 more tiles
@@ -4904,7 +4904,7 @@ void map_clear_all_elements()
 }
 
 money32 place_park_entrance(int flags, sint16 x, sint16 y, sint16 z, uint8 direction) {
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
 		return MONEY32_UNDEFINED;
 	}
 
diff --git a/src/world/park.c b/src/world/park.c
index a2d87dbdca..b894631142 100644
--- a/src/world/park.c
+++ b/src/world/park.c
@@ -535,7 +535,7 @@ static void park_generate_new_guests()
  */
 void park_update()
 {
-	if (RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & 0x0E)
+	if (gScreenFlags & 0x0E)
 		return;
 
 	// Every 5 seconds approximately
@@ -817,7 +817,7 @@ void game_command_remove_park_entrance(int *eax, int *ebx, int *ecx, int *edx, i
 	y = *ecx & 0xFFFF;
 	z = *edx * 16;
 
-	if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
+	if (!(gScreenFlags & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
 		*ebx = MONEY32_UNDEFINED;
 		return;
 	}
@@ -942,7 +942,7 @@ money32 map_buy_land_rights_for_tile(int x, int y, int setting, int flags) {
 			return 0;
 		}
 
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || (surfaceElement->properties.surface.ownership & OWNERSHIP_AVAILABLE) == 0) {
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || (surfaceElement->properties.surface.ownership & OWNERSHIP_AVAILABLE) == 0) {
 			gGameCommandErrorText = STR_LAND_NOT_FOR_SALE;
 			return MONEY32_UNDEFINED;
 		}
@@ -970,7 +970,7 @@ money32 map_buy_land_rights_for_tile(int x, int y, int setting, int flags) {
 			return 0;
 		}
 
-		if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || (surfaceElement->properties.surface.ownership & OWNERSHIP_CONSTRUCTION_RIGHTS_AVAILABLE) == 0) {
+		if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || (surfaceElement->properties.surface.ownership & OWNERSHIP_CONSTRUCTION_RIGHTS_AVAILABLE) == 0) {
 			gGameCommandErrorText = STR_CONSTRUCTION_RIGHTS_NOT_FOR_SALE;
 			return MONEY32_UNDEFINED;
 		}
@@ -1003,7 +1003,7 @@ money32 map_buy_land_rights_for_tile(int x, int y, int setting, int flags) {
 		}
 		return 0;
 	default:
-		if (!(RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
+		if (!(gScreenFlags & SCREEN_FLAGS_EDITOR) && !gCheatsSandboxMode) {
 			return MONEY32_UNDEFINED;
 		}
 
@@ -1077,7 +1077,7 @@ int map_buy_land_rights(int x0, int y0, int x1, int y1, int setting, int flags)
 	// Game command modified to accept selection size
 	totalCost = 0;
 	gGameCommandErrorText = STR_CONSTRUCTION_NOT_POSSIBLE_WHILE_GAME_IS_PAUSED;
-	if ((RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || RCT2_GLOBAL(RCT2_ADDRESS_GAME_PAUSED, uint8) == 0 || gCheatsBuildInPauseMode) {
+	if ((gScreenFlags & SCREEN_FLAGS_SCENARIO_EDITOR) != 0 || RCT2_GLOBAL(RCT2_ADDRESS_GAME_PAUSED, uint8) == 0 || gCheatsBuildInPauseMode) {
 		for (y = y0; y <= y1; y += 32) {
 			for (x = x0; x <= x1; x += 32) {
 				cost = map_buy_land_rights_for_tile(x, y, setting, flags);