Minimum System Requirements:

OS: Windows XP
Processor: Intel Dual Core 1.8GHz (or higher) or AMD Athlon II X2 (or higher)
Memory: 1GB (or higher)
Hard Disk Space: 10GB of free space
Video Card: nVidia GF6600 (or higher) or ATi X1600 (or higher) with 256MB of RAM
DirectX®: 9.0c
Sound: DirectSound compatible, DirectX 9.0c (or higher) compatible

Recommended System Requirements:

OS: Windows Vista, 7
Processor: Intel Core2 Duo 2.60GHz (or higher) or AMD Phenom II X2 (or higher)
Memory: 2GB
Hard Disk Space: 10GB of free space
Video Card: nVidia GF8800 (or higher) or ATi X1950 (or higher) with 512MB of RAM
DirectX®: 9.0c
Sound: DirectSound compatible, DirectX 9.0c (or higher) compatible