* GUI System * 3D terrain editor * 3D object animation manager * Accompanying script editor * MonoDevelop (win/mac) * It can also use Visual Studio (Windows) * It is a multi-platform game engine with features like ( 3D objects, physics, animation, scripting, lighting etc.) * Many platforms executable exporter Web player/ Android/Native application/Wii
In Unity 3D, you can assemble art and assets into scenes and environments like adding special effects, physics and animation, lighting, etc.