Minimum System Requirements:

Intel/AMD 1.6 GHz
Windows XP (32Bit)
512Mb RAM
DX9 Compatible 128 MB Graphics-card
Support for Pixel/Vertex shader 1.1 (GeForce 3 and above)
DirectX Compatible Sound Card
DVD-Drive
6Gb HDD Space
DirectX 9 (included)

Recommended System Requirements:
Intel/AMD 3.0 GHz
Windows XP SP2
1024Mb RAM
DX9 Compatible 256Mb Graphics-card
Support for Pixel/Vertex shader 3.0 (GeForce 6/Radeon X1x00 and above)
DVD-Drive
7Gb HDD Space