diff --git a/.gitignore b/.gitignore
index 1a42c8495..94a1dd85d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,4 +91,10 @@ src/Packages/Passport/Runtime/ThirdParty/Gree/Assets/Plugins/WebView.bundle/**/*
 *.idea
 
 # Code coverage
-sample/ProjectSettings/Packages/com.unity.testtools.codecoverage/Settings.json
\ No newline at end of file
+sample/ProjectSettings/Packages/com.unity.testtools.codecoverage/Settings.json
+
+# AltTester
+sample/AltTester.log
+
+# Crashes
+sample/mono_crash*
\ No newline at end of file
diff --git a/sample/Assets/Editor/MacBuilder.cs b/sample/Assets/Editor/MacBuilder.cs
new file mode 100644
index 000000000..2b12e8e2b
--- /dev/null
+++ b/sample/Assets/Editor/MacBuilder.cs
@@ -0,0 +1,43 @@
+#if UNITY_EDITOR_OSX
+
+using UnityEngine;
+using UnityEditor;
+using AltTester.AltTesterUnitySDK.Editor;
+using AltTester.AltTesterUnitySDK;
+using System;
+
+public class BuildScript
+{
+    static void BuildForAltTester()
+    {
+        try
+        {
+            BuildPlayerOptions buildPlayerOptions = new BuildPlayerOptions();
+            buildPlayerOptions.scenes = new string[] {
+            "Assets/Scenes/UnauthenticatedScene.unity", "Assets/Scenes/AuthenticatedScene.unity"
+        };
+
+            buildPlayerOptions.locationPathName = "Builds/MacOS/SampleApp.app";
+            buildPlayerOptions.target = BuildTarget.StandaloneOSX;
+            buildPlayerOptions.options = BuildOptions.Development | BuildOptions.IncludeTestAssemblies | BuildOptions.AutoRunPlayer;
+
+            // Setup for AltTester
+            var buildTargetGroup = BuildTargetGroup.Standalone;
+            AltBuilder.AddAltTesterInScriptingDefineSymbolsGroup(buildTargetGroup);
+            if (buildTargetGroup == UnityEditor.BuildTargetGroup.Standalone)
+                AltBuilder.CreateJsonFileForInputMappingOfAxis();
+            var instrumentationSettings = new AltInstrumentationSettings();
+            AltBuilder.InsertAltInScene(buildPlayerOptions.scenes[0], instrumentationSettings);
+
+            var results = BuildPipeline.BuildPlayer(buildPlayerOptions);
+            AltBuilder.RemoveAltTesterFromScriptingDefineSymbols(BuildTargetGroup.Standalone);
+
+        }
+        catch (Exception exception)
+        {
+            Debug.LogException(exception);
+        }
+    }
+}
+
+#endif
diff --git a/sample/Assets/Editor/MacBuilder.cs.meta b/sample/Assets/Editor/MacBuilder.cs.meta
new file mode 100644
index 000000000..1c0e753f8
--- /dev/null
+++ b/sample/Assets/Editor/MacBuilder.cs.meta
@@ -0,0 +1,11 @@
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+guid: d1eac0e7f392c49e39b00d289dac3948
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+  defaultReferences: []
+  executionOrder: 0
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+  assetBundleVariant: 
diff --git a/sample/Assets/Resources.meta b/sample/Assets/Resources.meta
new file mode 100644
index 000000000..fe4626cae
--- /dev/null
+++ b/sample/Assets/Resources.meta
@@ -0,0 +1,8 @@
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+guid: db7e6b8097b034c0496a426a80920c6c
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/sample/Assets/Resources/AltTester.meta b/sample/Assets/Resources/AltTester.meta
new file mode 100644
index 000000000..637aef4c8
--- /dev/null
+++ b/sample/Assets/Resources/AltTester.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: e09f1d13641c24565a740d81a2ab6c8f
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
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diff --git a/sample/Assets/Resources/AltTester/AltTesterInputAxisData.json b/sample/Assets/Resources/AltTester/AltTesterInputAxisData.json
new file mode 100644
index 000000000..df6209207
--- /dev/null
+++ b/sample/Assets/Resources/AltTester/AltTesterInputAxisData.json
@@ -0,0 +1 @@
+[{"name":"Horizontal","negativeButton":"left","positiveButton":"right","altPositiveButton":"d","altNegativeButton":"a","type":0,"axisDirection":0},{"name":"Vertical","negativeButton":"down","positiveButton":"up","altPositiveButton":"w","altNegativeButton":"s","type":0,"axisDirection":0},{"name":"Fire1","negativeButton":"","positiveButton":"left ctrl","altPositiveButton":"mouse 0","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Fire2","negativeButton":"","positiveButton":"left alt","altPositiveButton":"mouse 1","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Fire3","negativeButton":"","positiveButton":"left shift","altPositiveButton":"mouse 2","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Jump","negativeButton":"","positiveButton":"space","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Mouse X","negativeButton":"","positiveButton":"","altPositiveButton":"","altNegativeButton":"","type":1,"axisDirection":0},{"name":"Mouse Y","negativeButton":"","positiveButton":"","altPositiveButton":"","altNegativeButton":"","type":1,"axisDirection":1},{"name":"Mouse ScrollWheel","negativeButton":"","positiveButton":"","altPositiveButton":"","altNegativeButton":"","type":1,"axisDirection":2},{"name":"Horizontal","negativeButton":"","positiveButton":"","altPositiveButton":"","altNegativeButton":"","type":2,"axisDirection":0},{"name":"Vertical","negativeButton":"","positiveButton":"","altPositiveButton":"","altNegativeButton":"","type":2,"axisDirection":1},{"name":"Fire1","negativeButton":"","positiveButton":"joystick button 0","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Fire2","negativeButton":"","positiveButton":"joystick button 1","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Fire3","negativeButton":"","positiveButton":"joystick button 2","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Jump","negativeButton":"","positiveButton":"joystick button 3","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Submit","negativeButton":"","positiveButton":"return","altPositiveButton":"joystick button 0","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Submit","negativeButton":"","positiveButton":"enter","altPositiveButton":"space","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Cancel","negativeButton":"","positiveButton":"escape","altPositiveButton":"joystick button 1","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Enable Debug Button 1","negativeButton":"","positiveButton":"left ctrl","altPositiveButton":"joystick button 8","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Enable Debug Button 2","negativeButton":"","positiveButton":"backspace","altPositiveButton":"joystick button 9","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Reset","negativeButton":"","positiveButton":"left alt","altPositiveButton":"joystick button 1","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Next","negativeButton":"","positiveButton":"page down","altPositiveButton":"joystick button 5","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Previous","negativeButton":"","positiveButton":"page up","altPositiveButton":"joystick button 4","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Validate","negativeButton":"","positiveButton":"return","altPositiveButton":"joystick button 0","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Persistent","negativeButton":"","positiveButton":"right shift","altPositiveButton":"joystick button 2","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Multiplier","negativeButton":"","positiveButton":"left shift","altPositiveButton":"joystick button 3","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Horizontal","negativeButton":"left","positiveButton":"right","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Vertical","negativeButton":"down","positiveButton":"up","altPositiveButton":"","altNegativeButton":"","type":0,"axisDirection":0},{"name":"Debug Vertical","negativeButton":"down","positiveButton":"up","altPositiveButton":"","altNegativeButton":"","type":2,"axisDirection":6},{"name":"Debug Horizontal","negativeButton":"left","positiveButton":"right","altPositiveButton":"","altNegativeButton":"","type":2,"axisDirection":5}]
\ No newline at end of file
diff --git a/sample/Assets/Resources/AltTester/AltTesterInputAxisData.json.meta b/sample/Assets/Resources/AltTester/AltTesterInputAxisData.json.meta
new file mode 100644
index 000000000..12701f0db
--- /dev/null
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@@ -0,0 +1,7 @@
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diff --git a/sample/Assets/Scenes/UnauthenticatedScene.unity b/sample/Assets/Scenes/UnauthenticatedScene.unity
index 8837c89c1..3aa97dc66 100644
--- a/sample/Assets/Scenes/UnauthenticatedScene.unity
+++ b/sample/Assets/Scenes/UnauthenticatedScene.unity
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+    m_PressedColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 1}
+    m_SelectedColor: {r: 0.9607843, g: 0.9607843, b: 0.9607843, a: 1}
+    m_DisabledColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 0.5019608}
+    m_ColorMultiplier: 1
+    m_FadeDuration: 0.1
+  m_SpriteState:
+    m_HighlightedSprite: {fileID: 0}
+    m_PressedSprite: {fileID: 0}
+    m_SelectedSprite: {fileID: 0}
+    m_DisabledSprite: {fileID: 0}
+  m_AnimationTriggers:
+    m_NormalTrigger: Normal
+    m_HighlightedTrigger: Highlighted
+    m_PressedTrigger: Pressed
+    m_SelectedTrigger: Selected
+    m_DisabledTrigger: Disabled
+  m_Interactable: 1
+  m_TargetGraphic: {fileID: 502683869}
+  toggleTransition: 1
+  graphic: {fileID: 654278398}
+  m_Group: {fileID: 0}
+  onValueChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_IsOn: 0
diff --git a/sample/Assets/Scripts/AuthenticatedScript.cs b/sample/Assets/Scripts/AuthenticatedScript.cs
index e433917f8..29788c724 100644
--- a/sample/Assets/Scripts/AuthenticatedScript.cs
+++ b/sample/Assets/Scripts/AuthenticatedScript.cs
@@ -190,7 +190,14 @@ public async void Logout()
         {
             ShowOutput("Logging out...");
 #if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-            await passport.LogoutPKCE();
+            if (SampleAppManager.UsePKCE)
+            {
+                await passport.LogoutPKCE();
+            }
+            else
+            {
+                await passport.Logout();
+            }
 #else
             await passport.Logout();
 #endif
diff --git a/sample/Assets/Scripts/SampleAppManager.cs b/sample/Assets/Scripts/SampleAppManager.cs
index f5794803a..e93f6f695 100644
--- a/sample/Assets/Scripts/SampleAppManager.cs
+++ b/sample/Assets/Scripts/SampleAppManager.cs
@@ -1,4 +1,6 @@
 public static class SampleAppManager
 {
+    public static bool InitialisedPassport { get; set; }
     public static bool IsConnected { get; set; }
+    public static bool UsePKCE { get; set; }
 }
\ No newline at end of file
diff --git a/sample/Assets/Scripts/UnauthenticatedScript.cs b/sample/Assets/Scripts/UnauthenticatedScript.cs
index f77b7d186..db098f220 100644
--- a/sample/Assets/Scripts/UnauthenticatedScript.cs
+++ b/sample/Assets/Scripts/UnauthenticatedScript.cs
@@ -15,37 +15,79 @@ public class UnauthenticatedScript : MonoBehaviour
     [SerializeField] private Button ConnectButton;
     [SerializeField] private Button ReloginButton;
     [SerializeField] private Button ReconnectButton;
+    [SerializeField] private Text SelectLoginMethod;
+    [SerializeField] private Toggle UseDeviceCodeAuthToggle;
+    [SerializeField] private Toggle UsePKCEToggle;
 
     private Passport passport;
 #pragma warning restore CS8618
 
-    async void Start()
+    void Start()
     {
-        try
+        Debug.Log("Starting...");
+        if (!SampleAppManager.InitialisedPassport)
         {
-            ShowOutput("Starting...");
-            LoginButton.gameObject.SetActive(false);
-            ConnectButton.gameObject.SetActive(false);
+            // Set up login method toggles
+#if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
+            // Allow users to select which login method
+            Debug.Log("");
+            ShowSelectLoginMethod(true);
+            UseDeviceCodeAuthToggle.onValueChanged.AddListener(delegate (bool on)
+            {
+                SampleAppManager.UsePKCE = !on;
+                ShowSelectLoginMethod(false);
+                InitialisePassport();
+            });
+            UsePKCEToggle.onValueChanged.AddListener(delegate (bool on)
+            {
+                SampleAppManager.UsePKCE = on;
+                ShowSelectLoginMethod(false);
+                InitialisePassport();
+            });
+#else
+            // Users cannot select which login method as only device code auth is supported
+            ShowSelectLoginMethod(false);
+            InitialisePassport();
+#endif
+        }
+        else
+        {
+            // This is called if user logged out from the Authenticated Scene
+            ShowSelectLoginMethod(false);
             ReloginButton.gameObject.SetActive(false);
             ReconnectButton.gameObject.SetActive(false);
+            LoginButton.gameObject.SetActive(true);
+            ConnectButton.gameObject.SetActive(true);
+            passport = Passport.Instance;
+        }
+    }
+
+    private void ShowSelectLoginMethod(bool show)
+    {
+        SelectLoginMethod.gameObject.SetActive(show);
+        UseDeviceCodeAuthToggle.gameObject.SetActive(show);
+        UsePKCEToggle.gameObject.SetActive(show);
+    }
+
+    private async void InitialisePassport()
+    {
+        try
+        {
+            ShowOutput("Initilising Passport");
 
+            // Initiliase Passport
             string clientId = "ZJL7JvetcDFBNDlgRs5oJoxuAUUl6uQj";
             string environment = Immutable.Passport.Model.Environment.SANDBOX;
-            string redirectUri = null;
-            string logoutRedirectUri = null;
-
-#if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-            redirectUri = "imxsample://callback";
-            logoutRedirectUri = "imxsample://callback/logout";
-#endif
+            string redirectUri = SampleAppManager.UsePKCE ? "imxsample://callback" : null;
+            string logoutRedirectUri = SampleAppManager.UsePKCE ? "imxsample://callback/logout" : null;
 
             passport = await Passport.Init(
 #if UNITY_STANDALONE_WIN || (UNITY_ANDROID && UNITY_EDITOR_WIN) || (UNITY_IPHONE && UNITY_EDITOR_WIN)
-                clientId, environment, redirectUri, logoutRedirectUri, 10000
+        clientId, environment, redirectUri, logoutRedirectUri, 10000
 #else
-                clientId, environment, redirectUri, logoutRedirectUri
+            clientId, environment, redirectUri, logoutRedirectUri
 #endif
-                );
+            );
 
             // Listen to Passport Auth events
             passport.OnAuthEvent += OnPassportAuthEvent;
@@ -58,11 +100,12 @@ async void Start()
             LoginButton.gameObject.SetActive(!hasCredsSaved);
             ConnectButton.gameObject.SetActive(!hasCredsSaved);
 
+            SampleAppManager.InitialisedPassport = true;
             ShowOutput("Ready");
         }
         catch (Exception ex)
         {
-            ShowOutput($"Start() error: {ex.Message}");
+            ShowOutput($"Initialise Passport error: {ex.Message}");
         }
     }
 
@@ -79,7 +122,14 @@ public async void Login()
             LoginButton.gameObject.SetActive(false);
 
 #if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-            await passport.LoginPKCE();
+            if (SampleAppManager.UsePKCE)
+            {
+                await passport.LoginPKCE();
+            }
+            else
+            {
+                await passport.Login();
+            }
 #else
             await passport.Login();
 #endif
@@ -101,12 +151,7 @@ public async void Login()
             else
             {
                 error = $"Login() error: {ex.Message}";
-                // Restart everything
-#if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-                await passport.Logout();
-#else
-                await passport.LogoutPKCE();
-#endif
+                await Logout();
             }
 
             Debug.Log(error);
@@ -149,7 +194,14 @@ public async void Connect()
             ConnectButton.gameObject.SetActive(false);
 
 #if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-            await passport.ConnectImxPKCE();
+            if (SampleAppManager.UsePKCE)
+            {
+                await passport.ConnectImxPKCE();
+            }
+            else
+            {
+                await passport.ConnectImx();
+            }
 #else
             await passport.ConnectImx();
 #endif
@@ -171,12 +223,7 @@ public async void Connect()
             else
             {
                 error = $"Connect() error: {ex.Message}";
-                // Restart everything
-#if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
-                await passport.Logout();
-#else
-                await passport.LogoutPKCE();
-#endif
+                await Logout();
             }
 
             Debug.Log(error);
@@ -211,6 +258,29 @@ public async void Reconnect()
         }
     }
 
+    private async UniTask Logout()
+    {
+        try
+        {
+#if (UNITY_ANDROID && !UNITY_EDITOR_WIN) || (UNITY_IPHONE && !UNITY_EDITOR_WIN) || UNITY_STANDALONE_OSX
+            if (SampleAppManager.UsePKCE)
+            {
+                await passport.LogoutPKCE();
+            }
+            else
+            {
+                await passport.Logout();
+            }
+#else
+            await passport.Logout();
+#endif
+        }
+        catch (Exception ex)
+        {
+            ShowOutput($"Logout() error: {ex.Message}");
+        }
+    }
+
     public void ClearStorageAndCache()
     {
 #if (UNITY_IPHONE && !UNITY_EDITOR) || (UNITY_ANDROID && !UNITY_EDITOR)
diff --git a/sample/Packages/manifest.json b/sample/Packages/manifest.json
index b9f0a9a59..04e258f76 100644
--- a/sample/Packages/manifest.json
+++ b/sample/Packages/manifest.json
@@ -1,5 +1,6 @@
 {
   "dependencies": {
+    "com.alttester.sdk": "2.1.1",
     "com.cysharp.unitask": "2.3.3",
     "com.immutable.passport": "file:../../src/Packages/Passport",
     "com.unity.ai.navigation": "1.1.4",
@@ -7,6 +8,8 @@
     "com.unity.ide.vscode": "1.2.5",
     "com.unity.test-framework": "1.3.0",
     "com.unity.testtools.codecoverage": "1.2.5",
+    "com.unity.editorcoroutines": "1.0.0",
+    "com.unity.textmeshpro": "3.0.9",
     "com.unity.visualscripting": "1.9.1",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",
@@ -47,6 +50,13 @@
       "scopes": [
         "com.cysharp.unitask"
       ]
+    },
+    {
+      "name": "package.openupm.com",
+      "url": "https://package.openupm.com",
+      "scopes": [
+        "com.alttester.sdk"
+      ]
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/sample/Packages/packages-lock.json b/sample/Packages/packages-lock.json
index c16c63bda..e24504bdb 100644
--- a/sample/Packages/packages-lock.json
+++ b/sample/Packages/packages-lock.json
@@ -1,5 +1,12 @@
 {
   "dependencies": {
+    "com.alttester.sdk": {
+      "version": "2.1.1",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {},
+      "url": "https://package.openupm.com"
+    },
     "com.cysharp.unitask": {
       "version": "2.3.3",
       "depth": 0,
@@ -25,6 +32,13 @@
       },
       "url": "https://packages.unity.com"
     },
+    "com.unity.editorcoroutines": {
+      "version": "1.0.0",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {},
+      "url": "https://packages.unity.com"
+    },
     "com.unity.ext.nunit": {
       "version": "2.0.3",
       "depth": 1,
@@ -83,6 +97,15 @@
       },
       "url": "https://packages.unity.com"
     },
+    "com.unity.textmeshpro": {
+      "version": "3.0.9",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {
+        "com.unity.ugui": "1.0.0"
+      },
+      "url": "https://packages.unity.com"
+    },
     "com.unity.ugui": {
       "version": "1.0.0",
       "depth": 1,
diff --git a/sample/ProjectSettings/PackageManagerSettings.asset b/sample/ProjectSettings/PackageManagerSettings.asset
index 7e6af3ad6..d86a61952 100644
--- a/sample/ProjectSettings/PackageManagerSettings.asset
+++ b/sample/ProjectSettings/PackageManagerSettings.asset
@@ -34,11 +34,19 @@ MonoBehaviour:
     m_IsDefault: 0
     m_Capabilities: 0
     m_ConfigSource: 4
-  m_UserSelectedRegistryName: Open UPM Packages
+  - m_Id: scoped:project:package.openupm.com
+    m_Name: package.openupm.com
+    m_Url: https://package.openupm.com
+    m_Scopes:
+    - com.alttester.sdk
+    m_IsDefault: 0
+    m_Capabilities: 0
+    m_ConfigSource: 4
+  m_UserSelectedRegistryName: package.openupm.com
   m_UserAddingNewScopedRegistry: 0
   m_RegistryInfoDraft:
     m_Modified: 0
     m_ErrorMessage: 
-    m_UserModificationsInstanceId: -830
+    m_UserModificationsInstanceId: -828
     m_OriginalInstanceId: -832
   m_LoadAssets: 0
diff --git a/sample/ProjectSettings/ProjectSettings.asset b/sample/ProjectSettings/ProjectSettings.asset
index 1288051bf..e870ef3d4 100644
--- a/sample/ProjectSettings/ProjectSettings.asset
+++ b/sample/ProjectSettings/ProjectSettings.asset
@@ -765,7 +765,8 @@ PlayerSettings:
   webGLThreadsSupport: 0
   webGLDecompressionFallback: 0
   webGLPowerPreference: 2
-  scriptingDefineSymbols: {}
+  scriptingDefineSymbols:
+    Standalone: 
   additionalCompilerArguments:
     Standalone:
     - -nullable+