OS *: Windows XP SP 3, Windows Vista/7/8
Processor: Intel Core 2 Duo @ 2 GHz / AMD Athlon 64 X2 equivalent
Memory: 2 GB RAM
Graphics: NVIDIA GeForce 9600GT / ATI Radeon HD 3830, 256 MB VRAM, Shader Model 3 support
DirectX®: 9.0c
Hard Drive: 6.5 GB HD space
Sound: DirectX Compatible
Additional: Initial installation requires one-time internet connection for Steam authentication, Software installations required (included with the game): STEAM Client, Microsoft DirectX, Visual C++ 2010 Redistributable, Visual C++ 2005 SP1 Redistributable