diff --git a/src/openrct2-ui/CMakeLists.txt b/src/openrct2-ui/CMakeLists.txt
index 440441b90c..0ff4920417 100644
--- a/src/openrct2-ui/CMakeLists.txt
+++ b/src/openrct2-ui/CMakeLists.txt
@@ -64,7 +64,8 @@ endif ()
 # Includes
 target_include_directories(${PROJECT} PRIVATE "${CMAKE_CURRENT_LIST_DIR}/.."
                                               ${SPEEX_INCLUDE_DIRS})
-target_include_directories(${PROJECT} SYSTEM PRIVATE ${SDL2_INCLUDE_DIRS})
+target_include_directories(${PROJECT} SYSTEM PRIVATE ${SDL2_INCLUDE_DIRS}
+                                                     "${CMAKE_CURRENT_LIST_DIR}/../openrct2/thirdparty")
 
 # Compiler flags
 if (WIN32)
diff --git a/src/openrct2-ui/UiContext.cpp b/src/openrct2-ui/UiContext.cpp
index 88c15d495d..1f75eac344 100644
--- a/src/openrct2-ui/UiContext.cpp
+++ b/src/openrct2-ui/UiContext.cpp
@@ -17,6 +17,7 @@
 #include "input/KeyboardShortcuts.h"
 #include "interface/InGameConsole.h"
 #include "interface/Theme.h"
+#include "scripting/UiExtensions.h"
 #include "title/TitleSequencePlayer.h"
 
 #include <SDL.h>
@@ -38,6 +39,7 @@
 #include <openrct2/interface/InteractiveConsole.h>
 #include <openrct2/localisation/StringIds.h>
 #include <openrct2/platform/Platform2.h>
+#include <openrct2/scripting/ScriptEngine.h>
 #include <openrct2/title/TitleSequencePlayer.h>
 #include <openrct2/ui/UiContext.h>
 #include <openrct2/ui/WindowManager.h>
@@ -46,6 +48,7 @@
 using namespace OpenRCT2;
 using namespace OpenRCT2::Drawing;
 using namespace OpenRCT2::Input;
+using namespace OpenRCT2::Scripting;
 using namespace OpenRCT2::Ui;
 
 #ifdef __MACOSX__
@@ -115,6 +118,12 @@ public:
         delete _platformUiContext;
     }
 
+    void Initialise() override
+    {
+        auto& scriptEngine = GetContext()->GetScriptEngine();
+        UiScriptExtensions::Extend(scriptEngine);
+    }
+
     void Update() override
     {
         _inGameConsole.Update();
diff --git a/src/openrct2/scripting/ScUi.hpp b/src/openrct2-ui/scripting/ScUi.hpp
similarity index 57%
rename from src/openrct2/scripting/ScUi.hpp
rename to src/openrct2-ui/scripting/ScUi.hpp
index a503f619e6..f3dea76ee1 100644
--- a/src/openrct2/scripting/ScUi.hpp
+++ b/src/openrct2-ui/scripting/ScUi.hpp
@@ -5,62 +5,10 @@
 #include <string>
 #include "../common.h"
 #include "../Context.h"
-#include "../interface/Window.h"
-#include "../interface/Window_internal.h"
-#include "../ui/UiContext.h"
-#include "../ui/WindowManager.h"
+#include "ScWindow.hpp"
 
 namespace OpenRCT2::Scripting
 {
-    class ScWindow
-    {
-    private:
-        rct_windowclass _class;
-        rct_windownumber _number;
-
-    public:
-        ScWindow(rct_windowclass c, rct_windownumber n)
-            : _class(c),
-              _number(n)
-        {
-        }
-
-        sint32 x_get() { return GetWindow()->x; }
-        void x_set(sint32 value)
-        {
-            auto w = GetWindow();
-            window_set_position(w, value, w->y);
-        }
-        sint32 y_get() { return GetWindow()->y; }
-        void y_set(sint32 value)
-        {
-            auto w = GetWindow();
-            window_set_position(w, w->x, value);
-        }
-        sint32 width_get() { return GetWindow()->width; }
-        sint32 height_get() { return GetWindow()->height; }
-        bool isSticky_get()
-        {
-            auto flags = GetWindow()->flags;
-            return (flags & (WF_STICK_TO_BACK | WF_STICK_TO_FRONT)) != 0;
-        }
-
-        static void Register(duk_context * ctx)
-        {
-            dukglue_register_property(ctx, &ScWindow::x_get, &ScWindow::x_set, "x");
-            dukglue_register_property(ctx, &ScWindow::y_get, &ScWindow::y_set, "y");
-            dukglue_register_property(ctx, &ScWindow::width_get, nullptr, "width");
-            dukglue_register_property(ctx, &ScWindow::height_get, nullptr, "height");
-            dukglue_register_property(ctx, &ScWindow::isSticky_get, nullptr, "isSticky");
-        }
-
-    private:
-        rct_window * GetWindow() const
-        {
-            return window_find_by_number(_class, _number);
-        }
-    };
-
     class ScUi
     {
     public:
diff --git a/src/openrct2-ui/scripting/ScWindow.hpp b/src/openrct2-ui/scripting/ScWindow.hpp
new file mode 100644
index 0000000000..40493029a0
--- /dev/null
+++ b/src/openrct2-ui/scripting/ScWindow.hpp
@@ -0,0 +1,58 @@
+#pragma once
+
+#include <dukglue/dukglue.h>
+#include "../common.h"
+#include "../interface/Window.h"
+#include "../interface/Window_internal.h"
+
+namespace OpenRCT2::Scripting
+{
+    class ScWindow
+    {
+    private:
+        rct_windowclass _class;
+        rct_windownumber _number;
+
+    public:
+        ScWindow(rct_windowclass c, rct_windownumber n)
+            : _class(c),
+              _number(n)
+        {
+        }
+
+        sint32 x_get() { return GetWindow()->x; }
+        void x_set(sint32 value)
+        {
+            auto w = GetWindow();
+            window_set_position(w, value, w->y);
+        }
+        sint32 y_get() { return GetWindow()->y; }
+        void y_set(sint32 value)
+        {
+            auto w = GetWindow();
+            window_set_position(w, w->x, value);
+        }
+        sint32 width_get() { return GetWindow()->width; }
+        sint32 height_get() { return GetWindow()->height; }
+        bool isSticky_get()
+        {
+            auto flags = GetWindow()->flags;
+            return (flags & (WF_STICK_TO_BACK | WF_STICK_TO_FRONT)) != 0;
+        }
+
+        static void Register(duk_context * ctx)
+        {
+            dukglue_register_property(ctx, &ScWindow::x_get, &ScWindow::x_set, "x");
+            dukglue_register_property(ctx, &ScWindow::y_get, &ScWindow::y_set, "y");
+            dukglue_register_property(ctx, &ScWindow::width_get, nullptr, "width");
+            dukglue_register_property(ctx, &ScWindow::height_get, nullptr, "height");
+            dukglue_register_property(ctx, &ScWindow::isSticky_get, nullptr, "isSticky");
+        }
+
+    private:
+        rct_window * GetWindow() const
+        {
+            return window_find_by_number(_class, _number);
+        }
+    };
+}
diff --git a/src/openrct2-ui/scripting/UiExtensions.cpp b/src/openrct2-ui/scripting/UiExtensions.cpp
new file mode 100644
index 0000000000..78e8ee318f
--- /dev/null
+++ b/src/openrct2-ui/scripting/UiExtensions.cpp
@@ -0,0 +1,16 @@
+#include <openrct2/scripting/ScriptEngine.h>
+#include "UiExtensions.h"
+#include "ScUi.hpp"
+#include "ScWindow.hpp"
+
+using namespace OpenRCT2::Scripting;
+
+void UiScriptExtensions::Extend(ScriptEngine& scriptEngine)
+{
+    auto ctx = scriptEngine.GetContext();
+
+    dukglue_register_global(ctx, std::make_shared<ScUi>(), "ui");
+
+    ScUi::Register(ctx);
+    ScWindow::Register(ctx);
+}
diff --git a/src/openrct2-ui/scripting/UiExtensions.h b/src/openrct2-ui/scripting/UiExtensions.h
new file mode 100644
index 0000000000..08b05edd41
--- /dev/null
+++ b/src/openrct2-ui/scripting/UiExtensions.h
@@ -0,0 +1,12 @@
+#pragma once
+
+namespace OpenRCT2::Scripting
+{
+    class ScriptEngine;
+
+    class UiScriptExtensions
+    {
+    public:
+        static void Extend(ScriptEngine& scriptEngine);
+    };
+}
diff --git a/src/openrct2/Context.cpp b/src/openrct2/Context.cpp
index 63597337a9..9e32f46d35 100644
--- a/src/openrct2/Context.cpp
+++ b/src/openrct2/Context.cpp
@@ -464,6 +464,7 @@ namespace OpenRCT2
             _gameState->InitAll(150);
 
             _titleScreen = std::make_unique<TitleScreen>(*_gameState);
+            _uiContext->Initialise();
             return true;
         }
 
diff --git a/src/openrct2/scripting/ScriptEngine.cpp b/src/openrct2/scripting/ScriptEngine.cpp
index ed86d8576e..82ba255bf3 100644
--- a/src/openrct2/scripting/ScriptEngine.cpp
+++ b/src/openrct2/scripting/ScriptEngine.cpp
@@ -25,7 +25,6 @@
 #include "ScPark.hpp"
 #include "ScTile.hpp"
 #include "ScThing.hpp"
-#include "ScUi.hpp"
 
 using namespace OpenRCT2;
 using namespace OpenRCT2::Scripting;
@@ -64,14 +63,11 @@ void ScriptEngine::Initialise()
     ScTile::Register(ctx);
     ScTileElement::Register(ctx);
     ScThing::Register(ctx);
-    ScUi::Register(ctx);
-    ScWindow::Register(ctx);
 
     dukglue_register_global(ctx, std::make_shared<ScConsole>(_console), "console");
     dukglue_register_global(ctx, std::make_shared<ScContext>(_execInfo, _hookEngine), "context");
     dukglue_register_global(ctx, std::make_shared<ScMap>(ctx), "map");
     dukglue_register_global(ctx, std::make_shared<ScPark>(), "park");
-    dukglue_register_global(ctx, std::make_shared<ScUi>(), "ui");
 
     LoadPlugins();
     StartPlugins();
diff --git a/src/openrct2/scripting/ScriptEngine.h b/src/openrct2/scripting/ScriptEngine.h
index 8d2f7b36a5..59457515d1 100644
--- a/src/openrct2/scripting/ScriptEngine.h
+++ b/src/openrct2/scripting/ScriptEngine.h
@@ -92,6 +92,7 @@ namespace OpenRCT2::Scripting
         ScriptEngine(InteractiveConsole& console, IPlatformEnvironment& env);
         ScriptEngine(ScriptEngine&) = delete;
 
+        duk_context * GetContext() { return _context; }
         HookEngine& GetHookEngine() { return _hookEngine; }
 
         void Update();
diff --git a/src/openrct2/ui/DummyUiContext.cpp b/src/openrct2/ui/DummyUiContext.cpp
index b81d478557..ceaa7669c0 100644
--- a/src/openrct2/ui/DummyUiContext.cpp
+++ b/src/openrct2/ui/DummyUiContext.cpp
@@ -24,6 +24,9 @@ namespace OpenRCT2::Ui
         IWindowManager* const _windowManager = CreateDummyWindowManager();
 
     public:
+        void Initialise() override
+        {
+        }
         void Update() override
         {
         }
diff --git a/src/openrct2/ui/UiContext.h b/src/openrct2/ui/UiContext.h
index bcf8290421..4be9911130 100644
--- a/src/openrct2/ui/UiContext.h
+++ b/src/openrct2/ui/UiContext.h
@@ -91,6 +91,7 @@ namespace OpenRCT2
         {
             virtual ~IUiContext() = default;
 
+            virtual void Initialise() abstract;
             virtual void Update() abstract;
             virtual void Draw(rct_drawpixelinfo * dpi) abstract;