diff --git a/Editor/Helpers/HeadlessSettings.cs b/Editor/Helpers/HeadlessSettings.cs
index f9d58ac..638ebbb 100644
--- a/Editor/Helpers/HeadlessSettings.cs
+++ b/Editor/Helpers/HeadlessSettings.cs
@@ -20,13 +20,13 @@ public class HeadlessSettings {
         [Serializable]
         public class SteamHeadless {
             [Tooltip("Fill with Defines that should be forced enabled for Headless Builds. Other Defines will be disabled.")]
-            public string[] enabledDefinesOverwrite;
+            public string[] enabledDefinesOverwrite = new string[] { "STEAM" };
         }
 
         [Serializable]
         public class GogHeadless {
             [Tooltip("Fill with Defines that should be forced enabled for Headless Builds. Other Defines will be disabled.")]
-            public string[] enabledDefinesOverwrite;
+            public string[] enabledDefinesOverwrite = new string[] { "GOGGALAXY", "DISABLESTEAMWORKS" };
         }
     }
 }
\ No newline at end of file
diff --git a/Editor/Modules/DefineModule.cs b/Editor/Modules/DefineModule.cs
index 43f0fd7..97d1dbe 100644
--- a/Editor/Modules/DefineModule.cs
+++ b/Editor/Modules/DefineModule.cs
@@ -8,6 +8,8 @@ public class DefineModule : TargetGroupDependentModuleBase {
         private EditorHelper.UI.ListField<string> definesList = null;
         private EditorHelper.UI.EditorPrefsManagedFoldoutArea foldoutArea = null;
 
+        List<string> defaultDefines = new List<string>() { "STEAM", "DISABLESTEAMWORKS", "GOGGALAXY" };
+
         public DefineModule(TargetGroupModule targetGroupModule) : base(targetGroupModule) {
             CreateDefinesList();
             foldoutArea = new EditorHelper.UI.EditorPrefsManagedFoldoutArea(OnFoldoutArea, "defineModule.targetFoldout");
@@ -64,5 +66,15 @@ void CreateDefinesList() {
                 }
             };
         }
+
+        List<string> AddDefaultDefines(List<string> defineList) {
+            foreach (string define in defaultDefines) {
+                if (!defineList.Contains(define) && !defineList.Contains("*"+define)) {
+                    defineList.Add("*"+define);
+                }
+            }
+
+            return defineList;
+        }
     }
 }
diff --git a/LICENSE.meta b/LICENSE.meta
new file mode 100644
index 0000000..8bc0eb3
--- /dev/null
+++ b/LICENSE.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 9c5c39361f0ce3249b262424f9752177
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Runtime/BuildManagerSettings.asset b/Runtime/BuildManagerSettings.asset
index f9b8a07..c98b339 100644
--- a/Runtime/BuildManagerSettings.asset
+++ b/Runtime/BuildManagerSettings.asset
@@ -64,6 +64,9 @@ MonoBehaviour:
   headless:
     jenkinsPropertiesPath: ../../jenkins.properties
     steam:
-      enabledDefinesOverwrite: []
+      enabledDefinesOverwrite:
+      - STEAM
     gog:
-      enabledDefinesOverwrite: []
+      enabledDefinesOverwrite:
+      - GOGGALAXY
+      - DISABLESTEAMWORKS
diff --git a/package.json b/package.json
index 8b6d5c4..1d77cdf 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
 	"unityRelease": "16f1",
 	"dependencies": {
 		"com.gentlymadstudios.editorhelper": "0.1.0",
+		"com.gentlymadstudios.vdfserializer": "0.1.0",
 		"com.unity.addressables": "1.20.5"
 	},
 	"keywords": [