diff --git a/src/cmdline_sprite.c b/src/cmdline_sprite.c
index 620e2617f7..62d3a399d5 100644
--- a/src/cmdline_sprite.c
+++ b/src/cmdline_sprite.c
@@ -590,7 +590,6 @@ int cmdline_for_sprite(const char **argv, int argc)
 		int resourceLength = strlen(resourcePath);
 
 		bool silent = (argc >= 4 && strcmp(argv[3], "silent") == 0);
-		bool fileExists = true;
 		SDL_RWops *file;
 
 		spriteFileHeader.num_entries = 0;
diff --git a/src/config.c b/src/config.c
index 9df1397b70..e456f3eef2 100644
--- a/src/config.c
+++ b/src/config.c
@@ -26,9 +26,6 @@
 #include "openrct2.h"
 #include "util/util.h"
 
-// Magic number for original game cfg file
-static const int MagicNumber = 0x0003113A;
-
 enum {
 	CONFIG_VALUE_TYPE_BOOLEAN,
 	CONFIG_VALUE_TYPE_UINT8,
@@ -1196,7 +1193,6 @@ static void title_sequence_open(const char *path, const char *customName)
 	SDL_RWops *file;
 	int fileEnumHandle, i, preset;
 	char parts[3 * 128], *token, *part1, *part2;
-	char separator = platform_get_path_separator();
 
 	// Check for the script file
 	safe_strcpy(scriptPath, path, MAX_PATH);
diff --git a/src/drawing/rect.c b/src/drawing/rect.c
index 0a7e3c76cf..d9cde295a3 100644
--- a/src/drawing/rect.c
+++ b/src/drawing/rect.c
@@ -204,7 +204,6 @@ void gfx_fill_rect(rct_drawpixelinfo *dpi, int left, int top, int right, int bot
 		right |= colour;
 		RCT2_GLOBAL(0xEDF838,sint32) = right;
 		//right <<= 4;
-		int edi = esi;
 		esi = RCT2_GLOBAL(0xEDF828,sint32);
 		esi *= 0x40;
 		left = 0;
diff --git a/src/drawing/string.c b/src/drawing/string.c
index 97807eb9d8..be985580b0 100644
--- a/src/drawing/string.c
+++ b/src/drawing/string.c
@@ -67,7 +67,6 @@ int gfx_get_string_width_new_lined(utf8 *text)
 	utf8 backup;
 	int codepoint;
 
-	int width = 0;
 	int maxWidth = 0;
 	while ((codepoint = utf8_get_next(ch, (const utf8**)&nextCh)) != 0) {
 		if (codepoint == FORMAT_NEWLINE || codepoint == FORMAT_NEWLINE_SMALLER) {
@@ -979,7 +978,6 @@ static void ttf_draw_string_raw_ttf(rct_drawpixelinfo *dpi, const utf8 *text, te
 			}
 		}
 
-		int fontSize = font_get_size_from_sprite_base(info->font_sprite_base);
 		int drawX = info->x + fontDesc->offset_x;
 		int drawY = info->y + fontDesc->offset_y;
 		int width = surface->w;
diff --git a/src/interface/Theme.cpp b/src/interface/Theme.cpp
index be86ff1a2f..d26191fb0c 100644
--- a/src/interface/Theme.cpp
+++ b/src/interface/Theme.cpp
@@ -414,7 +414,6 @@ UITheme * UITheme::FromJson(const json_t * json)
     }
 
     json_t * jsonEntries = json_object_get(json, "entries");
-    size_t numEntries = json_object_size(jsonEntries);
 
     UITheme * result = nullptr;
     try
@@ -436,7 +435,6 @@ UITheme * UITheme::FromJson(const json_t * json)
 
         const char * jkey;
         json_t     * jvalue;
-        size_t       i = 0;
         json_object_foreach(jsonEntries, jkey, jvalue)
         {
             const WindowThemeDesc * wtDesc = GetWindowThemeDescriptor(jkey);
diff --git a/src/interface/console.c b/src/interface/console.c
index b2fa78e783..892606e548 100644
--- a/src/interface/console.c
+++ b/src/interface/console.c
@@ -54,7 +54,6 @@ static utf8 _consoleBuffer[CONSOLE_BUFFER_SIZE] = { 0 };
 static utf8 *_consoleBufferPointer = _consoleBuffer;
 static utf8 *_consoleViewBufferStart = _consoleBuffer;
 static utf8 _consoleCurrentLine[CONSOLE_INPUT_SIZE];
-static utf8 *_consoleCurrentLinePointer = _consoleCurrentLine;
 static int _consoleCaretTicks;
 static utf8 _consolePrintfBuffer[CONSOLE_BUFFER_2_SIZE];
 static utf8 _consoleErrorBuffer[CONSOLE_BUFFER_2_SIZE];
@@ -806,8 +805,6 @@ static int cc_load_object(const utf8 **argv, int argc) {
 		utf8 path[MAX_PATH];
 
 		substitute_path(path, RCT2_ADDRESS(RCT2_ADDRESS_OBJECT_DATA_PATH, char), argv[0]);
-		// Require pointer to start of filename
-		utf8* last_char = path + strlen(path);
 		strcat(path, ".DAT\0");
 
 		rct_object_entry entry;
diff --git a/src/interface/title_sequences.c b/src/interface/title_sequences.c
index 5adf30d191..84991c25f2 100644
--- a/src/interface/title_sequences.c
+++ b/src/interface/title_sequences.c
@@ -180,7 +180,6 @@ void title_sequence_delete_preset(int preset)
 	if (preset >= TITLE_SEQUENCE_DEFAULT_PRESETS && preset < gConfigTitleSequences.num_presets) {
 		// Delete the folder
 		utf8 path[MAX_PATH];
-		char separator = platform_get_path_separator();
 		platform_get_user_directory(path, "title sequences");
 		strcat(path, gConfigTitleSequences.presets[preset].name);
 		if (!platform_directory_delete(path)) {
diff --git a/src/interface/viewport.c b/src/interface/viewport.c
index 19fbb254ad..4a6c9d0318 100644
--- a/src/interface/viewport.c
+++ b/src/interface/viewport.c
@@ -662,7 +662,9 @@ void viewport_render(rct_drawpixelinfo *dpi, rct_viewport *viewport, int left, i
 	if (left >= viewport->x + viewport->width)return;
 	if (top >= viewport->y + viewport->height)return;
 
+#ifdef DEBUG_SHOW_DIRTY_BOX
 	int l = left, t = top, r = right, b = bottom;
+#endif
 
 	left = max(left - viewport->x, 0);
 	right = min(right - viewport->x, viewport->width);
@@ -783,7 +785,6 @@ void viewport_paint(rct_viewport* viewport, rct_drawpixelinfo* dpi, int left, in
 		}
 		RCT2_GLOBAL(0xEE7880, uint32) = 0xF1A4CC;
 		RCT2_GLOBAL(0x140E9A8, uint32) = (int)dpi2;
-		int ebp = 0, ebx = 0, esi = 0, ecx = 0;
 		painter_setup();
 		viewport_paint_setup();
 		sub_688217();
diff --git a/src/interface/window.c b/src/interface/window.c
index 536fe8dd99..cfdf94ee79 100644
--- a/src/interface/window.c
+++ b/src/interface/window.c
@@ -1937,9 +1937,6 @@ void window_event_unknown_0E_call(rct_window *w)
 void window_get_scroll_size(rct_window *w, int scrollIndex, int *width, int *height)
 {
 	if (w->event_handlers->get_scroll_size != NULL) {
-		rct_widget *widget = window_get_scroll_widget(w, scrollIndex);
-		int widgetIndex = window_get_widget_index(w, widget);
-
 		w->event_handlers->get_scroll_size(w, scrollIndex, width, height);
 	}
 }
diff --git a/src/intro.c b/src/intro.c
index fa16cc6995..87d15e2586 100644
--- a/src/intro.c
+++ b/src/intro.c
@@ -34,7 +34,6 @@ void intro_update()
 {
 	rct_drawpixelinfo *screenDPI = &gScreenDPI;
 	int screenWidth = gScreenWidth;
-	int screenHeight = gScreenHeight;
 	uint8 (*part) = RCT2_ADDRESS(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8);
 
 	screen_intro_process_mouse_input();
diff --git a/src/management/finance.c b/src/management/finance.c
index eb4615f6ed..ba63fe9d99 100644
--- a/src/management/finance.c
+++ b/src/management/finance.c
@@ -213,7 +213,6 @@ void finance_update_daily_profit()
 		rct_peep *peep;
 
 		FOR_ALL_STAFF(sprite_index, peep) {
-			uint8 staff_type = peep->staff_type;
 			current_profit -= wage_table[peep->staff_type];
 		}
 
diff --git a/src/management/news_item.c b/src/management/news_item.c
index e2892b2f50..0e3b3fef34 100644
--- a/src/management/news_item.c
+++ b/src/management/news_item.c
@@ -274,7 +274,6 @@ void news_item_add_to_queue(uint8 type, rct_string_id string_id, uint32 assoc)
 
 void news_item_add_to_queue_raw(uint8 type, const utf8 *text, uint32 assoc)
 {
-	int i = 0;
 	rct_news_item *newsItem = RCT2_ADDRESS(RCT2_ADDRESS_NEWS_ITEM_LIST, rct_news_item);
 
 	// find first open slot
@@ -404,7 +403,6 @@ void news_item_disable_news(uint8 type, uint32 assoc)
 
 void news_item_add_to_queue_custom(rct_news_item *newNewsItem)
 {
-	int i = 0;
 	rct_news_item *newsItem = RCT2_ADDRESS(RCT2_ADDRESS_NEWS_ITEM_LIST, rct_news_item);
 
 	// Find first open slot
diff --git a/src/management/research.c b/src/management/research.c
index 10340b7f8a..dde99376d1 100644
--- a/src/management/research.c
+++ b/src/management/research.c
@@ -598,7 +598,6 @@ void research_insert_ride_entry(uint8 entryIndex, bool researched)
 
 void research_insert_scenery_group_entry(uint8 entryIndex, bool researched)
 {
-	rct_scenery_set_entry *scenerySetEntry = g_scenerySetEntries[entryIndex];
 	research_insert(researched, entryIndex, RESEARCH_CATEGORY_SCENERYSET);
 }
 
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 7a2166baf0..2c6a79390a 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -1012,7 +1012,6 @@ bool Network::CheckSRAND(uint32 tick, uint32 srand0)
 
 void Network::KickPlayer(int playerId)
 {
-	NetworkPlayer *player = GetPlayerByID(playerId);
 	for(auto it = client_connection_list.begin(); it != client_connection_list.end(); it++) {
 		if ((*it)->player->id == playerId) {
 			// Disconnect the client gracefully
diff --git a/src/network/twitch.cpp b/src/network/twitch.cpp
index a6fa89aa62..25cddbf23b 100644
--- a/src/network/twitch.cpp
+++ b/src/network/twitch.cpp
@@ -511,7 +511,6 @@ namespace Twitch
      */
     static char * strchrm(const char * str, const char * find)
     {
-        const char * result = nullptr;
         do
         {
             const char * fch = find;
diff --git a/src/object.c b/src/object.c
index 6ac3db84e8..40bb0a3047 100644
--- a/src/object.c
+++ b/src/object.c
@@ -359,7 +359,6 @@ int object_load_packed(SDL_RWops* rw)
 		for (char* curr_char = last_char - 1;; --curr_char){
 			if (*curr_char == '\\'){
 				substitute_path(path, RCT2_ADDRESS(RCT2_ADDRESS_OBJECT_DATA_PATH, char), "00000000.DAT");
-				char* last_char = path + strlen(path);
 				break;
 			}
 			if (*curr_char < '0') *curr_char = '0';
diff --git a/src/object_list.c b/src/object_list.c
index 4ef1ac52a2..ebbaf3f755 100644
--- a/src/object_list.c
+++ b/src/object_list.c
@@ -775,8 +775,6 @@ static uint32 install_object_entry(rct_object_entry* entry, rct_object_entry* in
 		return 0;
 	}
 
-	uint8 objectType = entry->flags & 0xF;
-
 	// See above note
 	RCT2_GLOBAL(0x009ADAF4, sint32) = -1;
 	RCT2_GLOBAL(0x009ADAFD, uint8) = 0;
diff --git a/src/paint/map_element/entrance.c b/src/paint/map_element/entrance.c
index e888ebd19b..70bb96919a 100644
--- a/src/paint/map_element/entrance.c
+++ b/src/paint/map_element/entrance.c
@@ -31,7 +31,6 @@
  */
 void ride_entrance_exit_paint(uint8 direction, int height, rct_map_element* map_element)
 {
-	rct_drawpixelinfo* dpi = RCT2_GLOBAL(0x140E9A8, rct_drawpixelinfo*);
 	uint8 is_exit = map_element->properties.entrance.type == ENTRANCE_TYPE_RIDE_EXIT;
 
 	if (RCT2_GLOBAL(0x9DEA6F, uint8_t) & 1){
@@ -234,7 +233,7 @@ void park_entrance_paint(uint8 direction, int height, rct_map_element* map_eleme
 		if (entrance->scrolling_mode == 0xFF)
 			break;
 
-			sub_98199C(scrolling_text_setup(park_text_id, scroll, entrance->scrolling_mode + direction / 2), 0, 0, 0x1C, 0x1C, 0x2F, height + entrance->text_height, 2, 2, height + entrance->text_height, get_current_rotation());
+		sub_98199C(scrolling_text_setup(park_text_id, scroll, entrance->scrolling_mode + direction / 2), 0, 0, 0x1C, 0x1C, 0x2F, height + entrance->text_height, 2, 2, height + entrance->text_height, get_current_rotation());
 		break;
 	case 1:
 	case 2:
diff --git a/src/paint/map_element/map_element.c b/src/paint/map_element/map_element.c
index 0d854fbbf8..e0fe681686 100644
--- a/src/paint/map_element/map_element.c
+++ b/src/paint/map_element/map_element.c
@@ -42,7 +42,6 @@ static void sub_68B3FB(int x, int y);
  */
 void map_element_paint_setup(int x, int y)
 {
-	rct_drawpixelinfo *dpi = RCT2_GLOBAL(0x0140E9A8, rct_drawpixelinfo*);
 	if (
 		x < gMapSizeUnits &&
 		y < gMapSizeUnits &&
diff --git a/src/peep/staff.c b/src/peep/staff.c
index 680fe7ca78..9392d7eec9 100644
--- a/src/peep/staff.c
+++ b/src/peep/staff.c
@@ -108,7 +108,7 @@ void game_command_hire_new_staff_member(int* eax, int* ebx, int* ecx, int* edx,
 
 	int newStaffId = i;
 
-	int _eax, _ebx, _ecx = _cx;
+	int _eax, _ebx;
 	rct_sprite_bounds *spriteBounds;
 	_ebx = _bl;
 
diff --git a/src/platform/linux.c b/src/platform/linux.c
index 8920d97d07..73869862ec 100644
--- a/src/platform/linux.c
+++ b/src/platform/linux.c
@@ -224,8 +224,6 @@ bool platform_open_common_file_dialog(utf8 *outFilename, file_dialog_desc *desc)
 	char *flags;
 	char filter[MAX_PATH] = { 0 };
 	char filterPatternRegex[64];
-	char *allFilesPatternDescription;
-	int allFilesPatternLength = 0;
 
 	size = MAX_PATH;
 	dtype = get_dialog_app(executable, &size);
@@ -397,7 +395,6 @@ utf8 *platform_open_directory_browser(utf8 *title) {
 void platform_show_messagebox(char *message) {
 	size_t size;
 	dialog_type dtype;
-	int exit_value;
 	char cmd[MAX_PATH];
 	char executable[MAX_PATH];
 
diff --git a/src/platform/posix.c b/src/platform/posix.c
index 8b1e15f87c..4865ffa232 100644
--- a/src/platform/posix.c
+++ b/src/platform/posix.c
@@ -332,7 +332,6 @@ int platform_enumerate_files_begin(const utf8 *pattern)
 			enumFileInfo->paths = malloc(cnt * sizeof(char *));
 			char **paths = enumFileInfo->paths;
 			// 256 is size of dirent.d_name
-			const int buf_len = min(MAX_PATH, 256);
 			const int dir_name_len = strnlen(dir_name, MAX_PATH);
 			char separator[] = {platform_get_path_separator(), 0};
 			for (int idx = 0; idx < cnt; idx++)
@@ -472,7 +471,6 @@ int platform_enumerate_directories_begin(const utf8 *directory)
 			enumFileInfo->paths = malloc(cnt * sizeof(char *));
 			char **paths = enumFileInfo->paths;
 			// 256 is size of dirent.d_name
-			const int buf_len = min(MAX_PATH, 256);
 			const int dir_name_len = strnlen(npattern, MAX_PATH);
 			char separator[] = {platform_get_path_separator(), 0};
 			for (int idx = 0; idx < cnt; idx++)
@@ -878,8 +876,6 @@ datetime64 platform_get_datetime_now_utc()
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 
-	uint64 utcEpoch = tv.tv_sec;
-
 	// Epoch starts from: 1970-01-01T00:00:00Z
 	// Convert to ticks from 0001-01-01T00:00:00Z
 	uint64 utcEpochTicks = (uint64)tv.tv_sec * 10000000ULL + tv.tv_usec * 10;
diff --git a/src/rct1/S4Importer.cpp b/src/rct1/S4Importer.cpp
index 08c74f2896..7ed2138f63 100644
--- a/src/rct1/S4Importer.cpp
+++ b/src/rct1/S4Importer.cpp
@@ -232,7 +232,6 @@ void S4Importer::AddAvailableEntriesFromMap()
         {
             uint8 pathColour = mapElement->type & 3;
             uint8 pathType = (mapElement->properties.path.type & 0xF0) >> 4;
-            uint8 supportsType = (mapElement->flags & 0x60) >> 5;
 
             pathType = (pathType << 2) | pathColour;
             uint8 pathAdditionsType = mapElement->properties.path.additions & 0x0F;
@@ -1062,7 +1061,7 @@ void S4Importer::ImportSavedView()
 
 void S4Importer::ClearExtraTileEntries()
 {
-	// Reset the map tile pointers
+    // Reset the map tile pointers
     for (int i = 0; i < 0x10000; i++)
     {
         gMapElementTilePointers[i] = (rct_map_element *)-1;
@@ -1103,7 +1102,7 @@ void S4Importer::ClearExtraTileEntries()
         }
     }
 
-	// 128 extra rows left to fill with blank tiles
+    // 128 extra rows left to fill with blank tiles
     for (int y = 0; y < 128 * 256; y++)
     {
         nextFreeMapElement->type = MAP_ELEMENT_TYPE_SURFACE;
@@ -1233,7 +1232,6 @@ void S4Importer::FixPaths()
             // Type
             uint8 pathColour = mapElement->type & 3;
             uint8 pathType = (mapElement->properties.path.type & 0xF0) >> 4;
-            uint8 supportsType = (mapElement->flags & 0x60) >> 5;
 
             pathType = (pathType << 2) | pathColour;
             uint8 entryIndex = _pathTypeToEntryMap[pathType];
diff --git a/src/rct2.c b/src/rct2.c
index 93f81ac648..4076705347 100644
--- a/src/rct2.c
+++ b/src/rct2.c
@@ -326,7 +326,7 @@ static void rct2_draw_fps()
 	int y = 2;
 
 	// Measure FPS
-	float fps = rct2_measure_fps();
+	rct2_measure_fps();
 
 	// Format string
 	utf8 buffer[64];
diff --git a/src/ride/cable_lift.c b/src/ride/cable_lift.c
index 522cba8c2f..c2416d0f18 100644
--- a/src/ride/cable_lift.c
+++ b/src/ride/cable_lift.c
@@ -395,8 +395,6 @@ bool sub_6DF21B_loop(rct_vehicle* vehicle) {
  */
 int cable_lift_update_track_motion(rct_vehicle *cableLift)
 {
-	rct_ride* ride = get_ride(cableLift->ride);
-
 	RCT2_GLOBAL(0x00F64E2C, uint8) = 0;
 	RCT2_GLOBAL(0x00F64E04, rct_vehicle*) = cableLift;
 	RCT2_GLOBAL(0x00F64E18, uint32) = 0;
diff --git a/src/ride/ride.c b/src/ride/ride.c
index 61c3861afb..8738561d29 100644
--- a/src/ride/ride.c
+++ b/src/ride/ride.c
@@ -3374,19 +3374,19 @@ int ride_music_params_update(sint16 x, sint16 y, sint16 z, uint8 rideIndex, uint
 				break;
 		}
 		rct_viewport* viewport = RCT2_GLOBAL(0x00F438A4, rct_viewport*);
-		sint16 view_width = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_width;
+		sint16 view_width = viewport->view_width;
 		sint16 view_width2 = view_width * 2;
-		sint16 view_x = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_x - view_width2;
-		sint16 view_y = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_y - view_width;
-		sint16 view_x2 = view_width2 + view_width2 + RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_width + view_x;
-		sint16 view_y2 = view_width + view_width + RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_height + view_y;
+		sint16 view_x = viewport->view_x - view_width2;
+		sint16 view_y = viewport->view_y - view_width;
+		sint16 view_x2 = view_width2 + view_width2 + viewport->view_width + view_x;
+		sint16 view_y2 = view_width + view_width + viewport->view_height + view_y;
 		if (view_x >= rotatedCoords.x ||
 			view_y >= rotatedCoords.y ||
 			view_x2 < rotatedCoords.x ||
 			view_y2 < rotatedCoords.y) {
 				goto label58;
 		}
-		int x2 = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->x + ((rotatedCoords.x - RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_x) >> RCT2_GLOBAL(0x00F438A4, rct_viewport*)->zoom);
+		int x2 = viewport->x + ((rotatedCoords.x - viewport->view_x) >> viewport->zoom);
 		x2 *= 0x10000;
 		uint16 screenwidth = gScreenWidth;
 		if (screenwidth < 64) {
@@ -3394,7 +3394,7 @@ int ride_music_params_update(sint16 x, sint16 y, sint16 z, uint8 rideIndex, uint
 		}
 		int pan_x = ((x2 / screenwidth) - 0x8000) >> 4;
 
-		int y2 = RCT2_GLOBAL(0x00F438A4, rct_viewport*)->y + ((rotatedCoords.y - RCT2_GLOBAL(0x00F438A4, rct_viewport*)->view_y) >> RCT2_GLOBAL(0x00F438A4, rct_viewport*)->zoom);
+		int y2 = viewport->y + ((rotatedCoords.y - viewport->view_y) >> viewport->zoom);
 		y2 *= 0x10000;
 		uint16 screenheight = gScreenHeight;
 		if (screenheight < 64) {
@@ -4788,7 +4788,6 @@ bool ride_create_vehicles(rct_ride *ride, int rideIndex, rct_xy_element *element
 			for (int i = 0; i < ride->num_vehicles; i++) {
 				rct_vehicle *vehicle = GET_VEHICLE(ride->vehicles[i]);
 
-				rct_ride_entry *rideType = get_ride_entry(vehicle->vehicle_type);
 				rct_ride_entry_vehicle *vehicleEntry = vehicle_get_vehicle_entry(vehicle);
 
 				if (!(vehicleEntry->flags_b & VEHICLE_ENTRY_FLAG_B_15)) {
diff --git a/src/ride/track.c b/src/ride/track.c
index 81cac7fb85..c829b7ffce 100644
--- a/src/ride/track.c
+++ b/src/ride/track.c
@@ -791,8 +791,6 @@ static money32 track_place(int rideIndex, int type, int originX, int originY, in
 		}
 
 		//6c53dc
-		// push baseZ and clearanceZ
-		int cur_z = baseZ * 8;
 
 		if ((flags & GAME_COMMAND_FLAG_APPLY) && !(flags & GAME_COMMAND_FLAG_GHOST)) {
 			footpath_remove_litter(x, y, z);
diff --git a/src/ride/track_design.c b/src/ride/track_design.c
index b817544b45..936a024a98 100644
--- a/src/ride/track_design.c
+++ b/src/ride/track_design.c
@@ -1077,7 +1077,6 @@ bool track_design_place_ride(rct_track_td6 *td6, sint16 x, sint16 y, sint16 z, u
 
 			//di
 			sint16 tempZ = z - trackCoordinates->z_begin;
-			uint32 trackFlags = track->flags;
 			uint32 edi =
 				((track->flags & 0x0F) << 17) |
 				((track->flags & 0x0F) << 28) |
diff --git a/src/ride/vehicle.c b/src/ride/vehicle.c
index ce13aa34d6..7b91f9d5a3 100644
--- a/src/ride/vehicle.c
+++ b/src/ride/vehicle.c
@@ -3160,9 +3160,6 @@ static void vehicle_update_travelling_cable_lift(rct_vehicle* vehicle) {
 		}
 	}
 
-	rct_ride_entry* rideEntry = get_ride_entry(vehicle->ride_subtype);
-	rct_ride_entry_vehicle* vehicleEntry = &rideEntry->vehicles[vehicle->vehicle_type];
-
 	if (vehicle->velocity <= 439800) {
 		vehicle->acceleration = 4398;
 	}
@@ -8013,8 +8010,6 @@ int vehicle_update_track_motion(rct_vehicle *vehicle, int *outStation)
 	rct_ride_entry *rideEntry = get_ride_entry(vehicle->ride_subtype);
 	rct_ride_entry_vehicle *vehicleEntry = vehicle_get_vehicle_entry(vehicle);
 
-	rct_map_element *mapElement = NULL;
-
 	if (vehicleEntry->flags_a & VEHICLE_ENTRY_FLAG_A_MINI_GOLF) {
 		return vehicle_update_track_motion_mini_golf(vehicle, outStation);
 	}
diff --git a/src/scenario.c b/src/scenario.c
index fa6fe7253a..3a40ca6f9b 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -773,7 +773,6 @@ int scenario_write_available_objects(FILE *file)
 void scenario_fix_ghosts(rct_s6_data *s6)
 {
 	// Remove all ghost elements
-	size_t mapElementTotalSize = MAX_MAP_ELEMENTS * sizeof(rct_map_element);
 	rct_map_element *destinationElement = s6->map_elements;
 
 	for (int y = 0; y < 256; y++) {
diff --git a/src/windows/editor_object_selection.c b/src/windows/editor_object_selection.c
index 6290ea083c..d3c801c9ed 100644
--- a/src/windows/editor_object_selection.c
+++ b/src/windows/editor_object_selection.c
@@ -331,7 +331,6 @@ static void visible_list_refresh(rct_window *w)
 	for (int i = 0; i < numObjects; i++) {
 		rct_object_filters *filter = get_object_filter(i);
 		int type = entry->flags & 0x0F;
-		int source = (entry->flags & 0xF0) >> 4;
 		if (type == w->selected_tab && !(*itemFlags & OBJECT_SELECTION_FLAG_6) && filter_source(entry) && filter_string(entry, filter) && filter_chunks(entry, filter)) {
 			currentListItem->entry = entry;
 			currentListItem->filter = filter;
diff --git a/src/windows/editor_objective_options.c b/src/windows/editor_objective_options.c
index a686fc5a0d..99ea9960cc 100644
--- a/src/windows/editor_objective_options.c
+++ b/src/windows/editor_objective_options.c
@@ -1043,8 +1043,6 @@ static void window_editor_objective_options_main_paint(rct_window *w, rct_drawpi
  */
 static void window_editor_objective_options_rides_mouseup(rct_window *w, int widgetIndex)
 {
-	rct_s6_info *s6Info = (rct_s6_info*)0x00141F570;
-
 	switch (widgetIndex) {
 	case WIDX_CLOSE:
 		window_close(w);
diff --git a/src/windows/guest_list.c b/src/windows/guest_list.c
index 32af4fd411..b8a777233a 100644
--- a/src/windows/guest_list.c
+++ b/src/windows/guest_list.c
@@ -850,7 +850,6 @@ static void window_guest_list_find_groups()
 		if (groupIndex >= 240)
 			break;
 
-		int ax = peep->sprite_index;
 		_window_guest_list_num_groups++;
 		_window_guest_list_groups_num_guests[groupIndex] = 1;
 		peep->flags &= ~(SPRITE_FLAGS_PEEP_VISIBLE);
diff --git a/src/windows/install_track.c b/src/windows/install_track.c
index f15e28f976..7a27cd9c32 100644
--- a/src/windows/install_track.c
+++ b/src/windows/install_track.c
@@ -328,7 +328,6 @@ static void window_install_track_paint(rct_window *w, rct_drawpixelinfo *dpi)
 		y += 10;
 
 		// Drop height is multiplied by 0.75
-		uint16 dropHeight = (td6->highest_drop_height + (td6->highest_drop_height / 2)) / 2;
 		gfx_draw_string_left(dpi, STR_HIGHEST_DROP_HEIGHT, &drops, 0, x, y);
 		y += 10;
 	}
diff --git a/src/windows/multiplayer.c b/src/windows/multiplayer.c
index e104862631..1ad960f8f7 100644
--- a/src/windows/multiplayer.c
+++ b/src/windows/multiplayer.c
@@ -338,10 +338,6 @@ static void window_multiplayer_players_scrollmousedown(rct_window *w, int scroll
 	w->selected_list_item = index;
 	window_invalidate(w);
 
-	rct_widget *listWidget = &w->widgets[WIDX_LIST];
-	int ddx = w->x + listWidget->left + x - w->scrolls[0].h_left;
-	int ddy = w->y + listWidget->top + y - w->scrolls[0].v_top;
-
 	window_player_open(network_get_player_id(index));
 }
 
@@ -559,10 +555,6 @@ static void window_multiplayer_groups_scrollmousedown(rct_window *w, int scrollI
 	w->selected_list_item = index;
 	window_invalidate(w);
 
-	rct_widget *listWidget = &w->widgets[WIDX_LIST];
-	int ddx = w->x + listWidget->left + x - w->scrolls[0].h_left;
-	int ddy = w->y + listWidget->top + y - w->scrolls[0].v_top;
-
 	game_do_command(2 | (_selectedGroup << 8), GAME_COMMAND_FLAG_APPLY, index, 0, GAME_COMMAND_MODIFY_GROUPS, 0, 0);
 }
 
diff --git a/src/windows/player.c b/src/windows/player.c
index f35859298d..4e427f5935 100644
--- a/src/windows/player.c
+++ b/src/windows/player.c
@@ -200,7 +200,6 @@ void window_player_open(uint8 id)
 {
 	rct_window* window;
 
-	int player = network_get_player_index(id);
 	window = window_bring_to_front_by_number(WC_PLAYER, id);
 	if (window == NULL) {
 		window = window_create_auto_pos(240, 170, &window_player_overview_events, WC_PLAYER, WF_RESIZABLE);
diff --git a/src/windows/research.c b/src/windows/research.c
index 5ef054966c..4028496244 100644
--- a/src/windows/research.c
+++ b/src/windows/research.c
@@ -521,7 +521,6 @@ static void window_research_funding_invalidate(rct_window *w)
 
 	// Checkboxes
 	uint8 activeResearchTypes = gResearchPriorities;
-	int uncompletedResearchTypes = gResearchUncompletedCategories;
 	for (int i = 0; i < 7; i++) {
 		int mask = 1 << i;
 		int widgetMask = 1 << (i + WIDX_TRANSPORT_RIDES);
diff --git a/src/windows/ride.c b/src/windows/ride.c
index bbad39dee0..0615ec694b 100644
--- a/src/windows/ride.c
+++ b/src/windows/ride.c
@@ -4627,8 +4627,6 @@ static void cancel_scenery_selection(){
  */
 static void setup_scenery_selection(rct_window* w)
 {
-	rct_ride* ride = get_ride(w->number);
-
 	if (RCT2_GLOBAL(0x009DEA6F, uint8) & 1){
 		cancel_scenery_selection();
 	}
@@ -4755,8 +4753,6 @@ static void window_ride_measurements_mousedown(int widgetIndex, rct_window *w, r
 	if (widgetIndex != WIDX_SAVE_TRACK_DESIGN)
 		return;
 
-	rct_ride *ride = get_ride(w->number);
-
 	gDropdownItemsFormat[0] = STR_SAVE_TRACK_DESIGN_ITEM;
 	gDropdownItemsFormat[1] = STR_SAVE_TRACK_DESIGN_WITH_SCENERY_ITEM;
 
diff --git a/src/windows/ride_construction.c b/src/windows/ride_construction.c
index c6c0d3c8df..8c403d51f3 100644
--- a/src/windows/ride_construction.c
+++ b/src/windows/ride_construction.c
@@ -3939,7 +3939,7 @@ static void ride_construction_tooldown_entrance_exit(int screenX, int screenY)
 		STR_CANT_BUILD_MOVE_EXIT_FOR_THIS_RIDE_ATTRACTION;
 
 	game_command_callback = game_command_callback_place_ride_entrance_or_exit;
-	money32 cost = game_do_command(
+	game_do_command(
 		RCT2_GLOBAL(0x00F44188, uint16),
 		(GAME_COMMAND_FLAG_APPLY) | ((RCT2_GLOBAL(0x00F44194, uint8) ^ 2) << 8),
 		RCT2_GLOBAL(0x00F4418A, uint16),
diff --git a/src/windows/server_list.c b/src/windows/server_list.c
index 239c7dbdcd..3d65a4b326 100644
--- a/src/windows/server_list.c
+++ b/src/windows/server_list.c
@@ -284,8 +284,6 @@ static void window_server_list_scroll_mousedown(rct_window *w, int scrollIndex,
 	if (serverIndex < 0) return;
 	if (serverIndex >= _numServerEntries) return;
 
-	char *serverAddress = _serverEntries[serverIndex].address;
-
 	rct_widget *listWidget = &w->widgets[WIDX_LIST];
 	int ddx = w->x + listWidget->left + x + 2 - w->scrolls[0].h_left;
 	int ddy = w->y + listWidget->top + y + 2 - w->scrolls[0].v_top;
@@ -782,7 +780,6 @@ static void fetch_servers_callback(http_json_response* response)
 		json_t *maxPlayers = json_object_get(server, "maxPlayers");
 		json_t *ip = json_object_get(server, "ip");
 		json_t *ip4 = json_object_get(ip, "v4");
-		json_t *ip6 = json_object_get(ip, "v6");
 		json_t *addressIp = json_array_get(ip4, 0);
 
 		if (name == NULL || version == NULL)
diff --git a/src/windows/sign.c b/src/windows/sign.c
index f56dd4909e..5ce3d4f7d4 100644
--- a/src/windows/sign.c
+++ b/src/windows/sign.c
@@ -536,8 +536,6 @@ static void window_sign_small_mouseup(rct_window *w, int widgetIndex)
  */
 static void window_sign_small_dropdown(rct_window *w, int widgetIndex, int dropdownIndex)
 {
-	rct_banner* banner = &gBanners[w->number];
-
 	switch (widgetIndex){
 	case WIDX_MAIN_COLOUR:
 		if (dropdownIndex == -1) return;
diff --git a/src/windows/staff.c b/src/windows/staff.c
index 9747349358..fecde9f2f3 100644
--- a/src/windows/staff.c
+++ b/src/windows/staff.c
@@ -556,8 +556,6 @@ void window_staff_overview_dropdown(rct_window *w, int widgetIndex, int dropdown
 	// Clear patrol
 	if (dropdownIndex == 1) {
 		rct_peep* peep = GET_PEEP(w->number);
-		int edi = peep->staff_id;
-		int ebx = edi << 9;
 
 		for (int i = 0; i < 128; i++)
 		{
diff --git a/src/windows/staff_list.c b/src/windows/staff_list.c
index 740bced486..5ea1483687 100644
--- a/src/windows/staff_list.c
+++ b/src/windows/staff_list.c
@@ -180,8 +180,6 @@ void window_staff_list_open()
 }
 
 void window_staff_list_cancel_tools(rct_window *w) {
-	int toolWindowClassification = gCurrentToolWidget.window_classification;
-	int toolWindowNumber = gCurrentToolWidget.window_number;
 	if (gInputFlags & INPUT_FLAG_TOOL_ACTIVE)
 		if (w->classification == gCurrentToolWidget.window_classification && w->number == gCurrentToolWidget.window_number)
 			tool_cancel();
diff --git a/src/windows/text_input.c b/src/windows/text_input.c
index 635ce12ba2..155e58a31a 100644
--- a/src/windows/text_input.c
+++ b/src/windows/text_input.c
@@ -342,7 +342,6 @@ static void window_text_input_paint(rct_window *w, rct_drawpixelinfo *dpi)
 
 void window_text_input_key(rct_window* w, int key)
 {
-	int text = key;
 	char new_char = platform_scancode_to_rct_keycode(0xFF&key);
 
 	// If the return button is pressed stop text input
diff --git a/src/windows/title_logo.c b/src/windows/title_logo.c
index 08e4e6b6a1..efa74ee59b 100644
--- a/src/windows/title_logo.c
+++ b/src/windows/title_logo.c
@@ -20,11 +20,6 @@
 #include "../interface/widget.h"
 #include "../interface/window.h"
 
-static rct_widget window_title_logo_widgets[] = {
-	{ WWT_EMPTY, 0, 0, 0, 0, 0, 0xFFFFFFFF, STR_NONE },
-	{ WIDGETS_END },
-};
-
 static void window_title_logo_paint(rct_window *w, rct_drawpixelinfo *dpi);
 
 static rct_window_event_list window_title_logo_events = {
diff --git a/src/windows/top_toolbar.c b/src/windows/top_toolbar.c
index b585e36b25..e49bd99f00 100644
--- a/src/windows/top_toolbar.c
+++ b/src/windows/top_toolbar.c
@@ -1442,12 +1442,10 @@ static void window_top_toolbar_scenery_tool_down(short x, short y, rct_window *w
 
 	int selectedTab = window_scenery_selected_scenery_by_tab[window_scenery_active_tab_index];
 	uint8 sceneryType = (selectedTab & 0xFF00) >> 8;
-	uint8 selectedScenery = selectedTab & 0xFF;
 
 	if (selectedTab == -1) return;
 
 	sint16 gridX, gridY;
-	int ebp = selectedTab;
 	uint32 parameter_1, parameter_2, parameter_3;
 
 	sub_6E1F34(x, y, selectedTab, &gridX, &gridY, &parameter_1, &parameter_2, &parameter_3);
@@ -2110,7 +2108,6 @@ money32 try_place_ghost_scenery(rct_xy16 map_tile, uint32 parameter_1, uint32 pa
 	scenery_remove_ghost_tool_placement();
 
 	uint8 scenery_type = (selected_tab & 0xFF00) >> 8;
-	uint8 selected_scenery = selected_tab & 0xFF;
 	money32 cost = 0;
 	rct_map_element* mapElement;
 
diff --git a/src/windows/track_list.c b/src/windows/track_list.c
index d3f4fde10b..b317c1ad13 100644
--- a/src/windows/track_list.c
+++ b/src/windows/track_list.c
@@ -515,7 +515,6 @@ static void window_track_list_paint(rct_window *w, rct_drawpixelinfo *dpi)
 		y += 10;
 
 		// Drop height is multiplied by 0.75
-		uint16 dropHeight = (td6->highest_drop_height + (td6->highest_drop_height / 2)) / 2;
 		gfx_draw_string_left(dpi, STR_HIGHEST_DROP_HEIGHT, &drops, 0, x, y);
 		y += 10;
 	}
diff --git a/src/world/map.c b/src/world/map.c
index 25f7fe3ff3..aa0120da60 100644
--- a/src/world/map.c
+++ b/src/world/map.c
@@ -1040,7 +1040,6 @@ void game_command_set_scenery_colour(int* eax, int* ebx, int* ecx, int* edx, int
 		}
 	}
 
-	bool found = false;
 	rct_map_element *map_element = map_get_small_scenery_element_at(x, y, base_height, scenery_type, quadrant);
 
 	if (map_element == NULL) {
@@ -1093,7 +1092,6 @@ void game_command_set_fence_colour(int* eax, int* ebx, int* ecx, int* edx, int*
 		return;
 	}
 
-	bool fence_found = false;
 	rct_map_element* map_element = map_get_fence_element_at(x, y, base_height, map_element_direction);
 
 	if (map_element == NULL) {
@@ -4160,7 +4158,6 @@ int map_can_construct_with_clear_at(int x, int y, int zLow, int zHigh, CLEAR_FUN
 				}
 				loc_68BABC:
 				if (clearFunc != NULL) {
-					int zero = 0;
 					if (!clearFunc(&map_element, x, y, flags, price)) {
 						continue;
 					}
@@ -4171,7 +4168,6 @@ int map_can_construct_with_clear_at(int x, int y, int zLow, int zHigh, CLEAR_FUN
 				return false;
 				loc_68BAE6:
 				if (clearFunc != NULL) {
-					int zero = 0;
 					if (!clearFunc(&map_element, x, y, flags, price)) {
 						goto loc_68B9B7;
 					}
diff --git a/src/world/map_animation.c b/src/world/map_animation.c
index 711309f2bf..3305f628c4 100644
--- a/src/world/map_animation.c
+++ b/src/world/map_animation.c
@@ -310,7 +310,6 @@ static bool map_animation_invalidate_track_onridephoto(int x, int y, int baseZ)
 {
 	rct_map_element *mapElement;
 
-	bool wasInvalidated = false;
 	mapElement = map_get_first_element_at(x >> 5, y >> 5);
 	do {
 		if (mapElement->base_height != baseZ)
@@ -319,7 +318,6 @@ static bool map_animation_invalidate_track_onridephoto(int x, int y, int baseZ)
 			continue;
 
 		if (mapElement->properties.track.type == TRACK_ELEM_ON_RIDE_PHOTO) {
-			int z = mapElement->base_height * 8;
 			map_invalidate_tile_zoom1(x, y, mapElement->base_height * 8, mapElement->clearance_height * 8);
 			if (game_is_paused()) {
 				return false;
diff --git a/src/world/sprite.c b/src/world/sprite.c
index 4c280cf877..3f2c4a4643 100644
--- a/src/world/sprite.c
+++ b/src/world/sprite.c
@@ -275,7 +275,6 @@ static void sprite_steam_particle_update(rct_steam_particle *steam)
 {
 	invalidate_sprite_2((rct_sprite*)steam);
 
-	int original_var24 = steam->var_24;
 	steam->var_24 += 0x5555;
 	if (steam->var_24 < 0x5555) {
 		sprite_move(