UNITY - Unity Scene File
This is a file generated by Unity which is a 3D engine mostly used to create video games. It contains a unique level or section within a 3D game containing environments, decorations, cameras, obstacles, objects and lighting. It is utilized with other scenes to create a virtual world during the editing process. Unity may be used to create 3D game for the Nintendo Wii, the iPhone, the web and as standalone applications for Mac OS X and Windows.