Steam account required for game activation and installation
OS: x86 or x64 bit versions of Microsoft Windows XP/Vista/Win7
Processor: AMD/Intel single or dual-core processor running at 2.2GHz (Intel Pentium D or AMD Athlon 64 x2 are probably the lowest CPU architectures recommended)
Memory: 1024MB for MS Windows XP and 1536MB for MS Windows Vista/Win7
Graphics: ATI/nVidia graphic card with at least 256MB of dedicated VRAM and with at least DirectX 9.0c and Shader Model 4.0 support. ATI Radeon HD 3600 and NVIDIA Geforce 8600 are minimum required graphic cards. The game also works on the latest generation of Intel HD 3000 IGPs and AMD 6500 series IGPs.
Hard Drive: 300 MB HD space
Sound: Integrated or dedicated DirectX 9 compatible soundcard
Additional: Keyboard, XBOX360 Controller (optional)
Processor: AMD/Intel dual/triple/quad-core processor running at 2.6 GHz
Memory:1536MB for MS Windows XP and 2048MB for Vista/Win7
Graphics: ATI/Nvidia dedicated graphic card with at least 512MB of dedicated VRAM and with at least DirectX 9.0c and Shader Model 4.0 support. ATI Radeon HD 3800 series and NVIDIA Geforce GTX260 and above are recommended graphic cards.