Windows
OS: Microsoft Windows XP (SP2 or later) / Windows Vista / Windows 7
Processor: Pentium D 3Ghz or AMD Athlon 64 X2 3600+ (Dual core) or higher
RAM: 1.5 GB RAM
Hard Disk Space: 8GB
Video Card: nVidia GeForce 8600 / ATI HD2600 Pro or better
Sound Card: 100% DirectX 9.0c compatible sound card
Peripherals: Keyboard and mouse or Windows compatible gamepad
Other Requirements: Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game)include nVidia PhysX_drivers 10.04.02_9.10.0522and nVidia GPU drivers 197.13 or latest, Steam Client and Microsoft DirectX.