diff --git a/Source/Editor/Content/Settings/BuildSettings.cs b/Source/Editor/Content/Settings/BuildSettings.cs
index 87530f1fb..5dc6310c3 100644
--- a/Source/Editor/Content/Settings/BuildSettings.cs
+++ b/Source/Editor/Content/Settings/BuildSettings.cs
@@ -25,13 +25,6 @@ namespace FlaxEditor.Content.Settings
                         Platform = BuildPlatform.Windows64,
                         Mode = BuildConfiguration.Development,
                     },
-                    new BuildTarget
-                    {
-                        Name = "Windows 32bit",
-                        Output = "Output\\Win32",
-                        Platform = BuildPlatform.Windows32,
-                        Mode = BuildConfiguration.Development,
-                    },
                 }
             },
             new BuildPreset
@@ -44,14 +37,7 @@ namespace FlaxEditor.Content.Settings
                         Name = "Windows 64bit",
                         Output = "Output\\Win64",
                         Platform = BuildPlatform.Windows64,
-                        Mode = BuildConfiguration.Development,
-                    },
-                    new BuildTarget
-                    {
-                        Name = "Windows 32bit",
-                        Output = "Output\\Win32",
-                        Platform = BuildPlatform.Windows32,
-                        Mode = BuildConfiguration.Development,
+                        Mode = BuildConfiguration.Release,
                     },
                 }
             },
diff --git a/Source/Editor/Content/Settings/BuildTarget.cs b/Source/Editor/Content/Settings/BuildTarget.cs
index 7cdc500f6..97c0b8c3d 100644
--- a/Source/Editor/Content/Settings/BuildTarget.cs
+++ b/Source/Editor/Content/Settings/BuildTarget.cs
@@ -35,6 +35,12 @@ namespace FlaxEditor.Content.Settings
         [EditorOrder(30), Tooltip("Configuration build mode")]
         public BuildConfiguration Mode;
 
+        /// <summary>
+        /// The list of custom defines passed to the build tool when compiling project scripts. Can be used in build scripts for configuration (Configuration.CustomDefines).
+        /// </summary>
+        [EditorOrder(90), Tooltip("The list of custom defines passed to the build tool when compiling project scripts. Can be used in build scripts for configuration (Configuration.CustomDefines).")]
+        public string[] CustomDefines;
+
         /// <summary>
         /// The pre-build action command line.
         /// </summary>
@@ -46,11 +52,5 @@ namespace FlaxEditor.Content.Settings
         /// </summary>
         [EditorOrder(110)]
         public string PostBuildAction;
-
-        /// <summary>
-        /// Gets the build options computed from the target configuration.
-        /// </summary>
-        [HideInEditor, NoSerialize]
-        public virtual BuildOptions Options => BuildOptions.None;
     }
 }
diff --git a/Source/Editor/Cooker/CookingData.h b/Source/Editor/Cooker/CookingData.h
index b46b8ff72..56b15af23 100644
--- a/Source/Editor/Cooker/CookingData.h
+++ b/Source/Editor/Cooker/CookingData.h
@@ -174,6 +174,11 @@ struct FLAXENGINE_API CookingData
     /// </summary>
     BuildOptions Options;
 
+    /// <summary>
+    /// The list of custom defines passed to the build tool when compiling project scripts. Can be used in build scripts for configuration (Configuration.CustomDefines).
+    /// </summary>
+    Array<String> CustomDefines;
+
     /// <summary>
     /// The original output path (actual OutputPath could be modified by the Platform Tools or a plugin for additional layout customizations or packaging). This path is preserved.
     /// </summary>
diff --git a/Source/Editor/Cooker/GameCooker.cpp b/Source/Editor/Cooker/GameCooker.cpp
index d68ca587a..efd6763d8 100644
--- a/Source/Editor/Cooker/GameCooker.cpp
+++ b/Source/Editor/Cooker/GameCooker.cpp
@@ -257,7 +257,7 @@ PlatformTools* GameCooker::GetTools(BuildPlatform platform)
     return result;
 }
 
-void GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration, const StringView& outputPath, BuildOptions options)
+void GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration, const StringView& outputPath, BuildOptions options, const Array<String>& customDefines)
 {
     if (IsRunning())
     {
@@ -281,6 +281,7 @@ void GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration,
     data.Platform = platform;
     data.Configuration = configuration;
     data.Options = options;
+    data.CustomDefines = customDefines;
     data.OutputPath = outputPath;
     FileSystem::NormalizePath(data.OutputPath);
     data.OutputPath = data.OriginalOutputPath = FileSystem::ConvertRelativePathToAbsolute(Globals::ProjectFolder, data.OutputPath);
diff --git a/Source/Editor/Cooker/GameCooker.h b/Source/Editor/Cooker/GameCooker.h
index 3defe51ff..f1bfc4ad3 100644
--- a/Source/Editor/Cooker/GameCooker.h
+++ b/Source/Editor/Cooker/GameCooker.h
@@ -84,7 +84,8 @@ public:
     /// <param name="configuration">The build configuration.</param>
     /// <param name="outputPath">The output path (output directory).</param>
     /// <param name="options">The build options.</param>
-    API_FUNCTION() static void Build(BuildPlatform platform, BuildConfiguration configuration, const StringView& outputPath, BuildOptions options);
+    /// <param name="customDefines">The list of custom defines passed to the build tool when compiling project scripts. Can be used in build scripts for configuration (Configuration.CustomDefines).</param>
+    API_FUNCTION() static void Build(BuildPlatform platform, BuildConfiguration configuration, const StringView& outputPath, BuildOptions options, const Array<String>& customDefines);
 
     /// <summary>
     /// Sends a cancel event to the game building service.
diff --git a/Source/Editor/Cooker/Steps/CompileScriptsStep.cpp b/Source/Editor/Cooker/Steps/CompileScriptsStep.cpp
index 3bb2e1eb6..dd7c77a94 100644
--- a/Source/Editor/Cooker/Steps/CompileScriptsStep.cpp
+++ b/Source/Editor/Cooker/Steps/CompileScriptsStep.cpp
@@ -217,6 +217,11 @@ bool CompileScriptsStep::Perform(CookingData& data)
         args += TEXT(" -SkipTargets=FlaxGame");
     }
 #endif
+    for (auto& define : data.CustomDefines)
+    {
+        args += TEXT(" -D");
+        args += define;
+    }
     if (ScriptsBuilder::RunBuildTool(args))
     {
         data.Error(TEXT("Failed to compile game scripts."));
diff --git a/Source/Editor/Windows/GameCookerWindow.cs b/Source/Editor/Windows/GameCookerWindow.cs
index 442cc4c34..278ce69d3 100644
--- a/Source/Editor/Windows/GameCookerWindow.cs
+++ b/Source/Editor/Windows/GameCookerWindow.cs
@@ -73,6 +73,9 @@ namespace FlaxEditor.Windows
                 [EditorOrder(20), Tooltip("Configuration build mode")]
                 public BuildConfiguration ConfigurationMode = BuildConfiguration.Development;
 
+                [EditorOrder(90), Tooltip("The list of custom defines passed to the build tool when compiling project scripts. Can be used in build scripts for configuration (Configuration.CustomDefines).")]
+                public string[] CustomDefines;
+
                 protected abstract BuildPlatform BuildPlatform { get; }
 
                 protected virtual BuildOptions Options
@@ -126,7 +129,7 @@ namespace FlaxEditor.Windows
                 public virtual void Build()
                 {
                     var output = StringUtils.ConvertRelativePathToAbsolute(Globals.ProjectFolder, StringUtils.NormalizePath(Output));
-                    GameCooker.Build(BuildPlatform, ConfigurationMode, output, Options);
+                    GameCooker.Build(BuildPlatform, ConfigurationMode, output, Options, CustomDefines);
                 }
             }
 
@@ -793,7 +796,7 @@ namespace FlaxEditor.Windows
                     _preBuildAction = target.PreBuildAction;
                     _postBuildAction = target.PostBuildAction;
 
-                    GameCooker.Build(target.Platform, target.Mode, target.Output, target.Options);
+                    GameCooker.Build(target.Platform, target.Mode, target.Output, BuildOptions.None, target.CustomDefines);
                 }
                 else if (_exitOnBuildEnd)
                 {