Пример корректного завершения игры в Unity

public void Quit() {
#if (UNITY_EDITOR || DEVELOPMENT_BUILD)
    Debug.Log(this.name+" : "+this.GetType()+" : "+System.Reflection.MethodBase.GetCurrentMethod().Name); 
#endif
#if (UNITY_EDITOR)
    UnityEditor.EditorApplication.isPlaying = false;
#elif (UNITY_STANDALONE) 
    Application.Quit();
#elif (UNITY_WEBGL)
    Application.OpenURL("аbout:blank");
#endif
  }