# Background: Unity

If you are not familiar with the [Unity Engine](https://unity3d.com/unity),
we highly recommend the 
[Unity Manual](https://docs.unity3d.com/Manual/index.html) and
[Tutorials page](https://unity3d.com/learn/tutorials). The 
[Roll-a-ball tutorial](https://unity3d.com/learn/tutorials/s/roll-ball-tutorial)
is a fantastic resource to learn all the basic concepts of Unity to get started
with ML-Agents: 
* [Editor](https://docs.unity3d.com/Manual/UsingTheEditor.html)
* [Interface](https://docs.unity3d.com/Manual/LearningtheInterface.html)
* [Scene](https://docs.unity3d.com/Manual/CreatingScenes.html)
* [GameObjects](https://docs.unity3d.com/Manual/GameObjects.html)
* [Rigidbody](https://docs.unity3d.com/ScriptReference/Rigidbody.html)
* [Camera](https://docs.unity3d.com/Manual/Cameras.html)
* [Scripting](https://docs.unity3d.com/Manual/ScriptingSection.html)
* [Ordering of event functions](https://docs.unity3d.com/Manual/ExecutionOrder.html)
(e.g. FixedUpdate, Update)