Steam account required for game activation and installation
MINIMUM
OS: Windows® Vista
PROCESSOR: 2 GHz Dual Core (Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz) CPU
HARD DISK SPACE: 20 GB free
VIDEO: 256 MB Video Memory NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater
SOUND: DirectX compatible sound card
RECOMMENDED
OS: Windows® 7
PROCESSOR: 2.4 GHz Quad Core CPU
MEMORY: 4 GB RAM
HARD DISK SPACE: 20 GB free
VIDEO: 512MB Video Memory ATI Radeon HD 3000 Series/NVIDIA GeForce 9000 Series or greater
SOUND CARD: DirectX compatible sound card
Other Requirements & Supports: Initial installation requires one-time broadband internet connection for Steam authentication; software installations required (included with the game) include Steam Client, Visual C++ 2008 Runtime Libraries, and Microsoft DirectX.