Despite being launched in 2005, Unity3D's popularity took off only a couple of years ago, with the release of version 3.5. It's very powerful and is capable of making games that can seem as good as any AAA title.

Unity3D supports the following platforms: Windows, Mac, Linux, Android, iOS, PS3, Xbox360, Wii U, and the web.

Unity3D's development is intuitive for beginners. A typical game is divided into multiple scenes, and each scene contains multiple game objects.

Each game object can have any number of attached scripts, and these scripts are what determine behaviors and interactions. Scripts can be written using UnityScript (Unity's version of JavaScript), C#, or Boo.