Unreal Engine is awarded as the Most Expensive Computer software till now. The software is a game engine developed by Epic Games. 3 versions are available in the market named as Unreal Engine 1,2,3,. It's a cross platform software written in C++, c#, unrealscript, CUDA, HLSL and GLSL. Current release is Unreal Engine 3 for Xbox 360 and Microsoft windows.
