Answer by whydoidoit

UnityScript (Javascript in Unity) **is not** Javascript and absolutely does have classes! However UnityScript cannot define a generic class - it can however inherit from one... If you defined your base MonoSingleton class in C# in a Plugins folder then you could use: class TestInherit extends MonoSingleton. { } The base class would look like this: using System.Collections; public class MonoSingleton : MonoBehaviour where T: MonoSingleton { public static T instance; void Awake() { instance = this as T; AwakeEx(); } protected virtual void AwakeEx() { } protected virtual void OnDestroyEx() { } void OnDestroy() { OnDestroyEx(); if(instance == this) instance = null; } } Note to avoid problems you should use AwakeEx and OnDestroyEx in the classes derived from MonoSingleton - they work just the same way but ensure the singleton is handled properly While I'm at it, here's a base class that creates a static collection of all the enabled derivatives: using System.Collections.Generic; using Unity.Engine; public class MonoCollection : MonoBehaviour where T : MonoCollection { public static List all = new List(); protected virtual void OnEnableEx() { } protected virtual void OnDisableEx() { } void OnEnable() { all.Add(this as T); OnEnableEx(); } void OnDisable() { all.Remove(this as T); OnDisableEx(); } }