Unity is a cross-platform 3D game development system developed by a company called Unity Technologies (originally named Over the Edge). What does it mean to call Unity cross-platform, exactly? Well, it’s cross-platform in the sense that the Unity Editor, the game creation and editing tool that is the centerpiece of Unity, runs on OS X and Windows. More impressively, Unity is cross-platform in the sense that from the Unity Editor we can build games for OS X, Windows, web browsers (using either Flash, Google Native client, or Unity’s browser plug-in), iOS, Android, and game consoles. And the list keeps growing (shortly before this book’s publication, Unity Technologies announced support for the BlackBerry 10)!