System Requirements
Minimum:

Supported OS: Microsoft® Windows® XP SP2/Vista
Processor: 3.0 GHz Single Core
Memory: 1 GB RAM
Graphics: Direct X 9.0c compliant, Shader 3.0 enabled video card with 256MB RAM (NVIDIA 6600 or better/ATI X1300 or better)
DirectX Version: DirectX 9.0c
Sound: Direct X 9.0c compliant sound card
Hard Drive: 5 GB of Available Hard Disk Space
Input: Keyboard and mouse
Multiplayer: Broadband Internet connection
Recommended:

Supported OS: Microsoft® Windows® XP SP2/Vista
Processor: 2.4 GHz Dual Core
Memory: 2 GB RAM
Graphics: Direct X 9.0c compliant, Shader 3.0 enabled video card with 512MB RAM (NVIDIA 7950 or better/ATI X1950 or better)
DirectX Version: DirectX 9.0c
Sound: Creative EAX 4.0 compliant sound card (Audigy 2, X-Fi series)
Hard Drive: 5 GB of Available Hard Disk Space
Input: Keyboard and mouse
Multiplayer: Broadband Internet connection