diff --git a/TapHeadingAndroid/Assets/Scripts/TapHeading/Game/GameManager.cs b/TapHeadingAndroid/Assets/Scripts/TapHeading/Game/GameManager.cs
index 52d48ce..af24f92 100644
--- a/TapHeadingAndroid/Assets/Scripts/TapHeading/Game/GameManager.cs
+++ b/TapHeadingAndroid/Assets/Scripts/TapHeading/Game/GameManager.cs
@@ -35,6 +35,7 @@ private void Start()
             var inputDebug = gameObject.AddComponent<DebugEditorInput>();
             inputDebug.AddListener(this);
 #endif
+            GooglePlayServicesManager.Instance.SignIn();
         }
 
         private void LoadFlagsFromPlayerPrefs()
diff --git a/TapHeadingAndroid/Assets/Scripts/TapHeading/Services/Google/GooglePlayServicesManager.cs b/TapHeadingAndroid/Assets/Scripts/TapHeading/Services/Google/GooglePlayServicesManager.cs
index 13a338d..fd57b29 100644
--- a/TapHeadingAndroid/Assets/Scripts/TapHeading/Services/Google/GooglePlayServicesManager.cs
+++ b/TapHeadingAndroid/Assets/Scripts/TapHeading/Services/Google/GooglePlayServicesManager.cs
@@ -158,5 +158,10 @@ public void GetHighScore(ISignInListener listener)
                     }
                 });
         }
+
+        public void SignIn()
+        {
+            PlayGamesPlatform.Instance.Authenticate(SignInInteractivity.CanPromptOnce, result => { });
+        }
     }
 }
\ No newline at end of file