Unity3D is a flexible, powerful, technically complex, but simple to use, 2D & 3D video game design engine. It has physics, collision, sprite and 3D model handling built in, and can be scripted using C#, Javascript ("UnityScript"), or Boo. Most importantly, the engine is platform independent, multi-platform, and has multiplayer networking capabilities built in. Platforms in which Unity3D creations can run on include Windows Phone, Android, iOS, PC, Mac, Web, smart TVs, and much more.