Recommended:

3 Ghz Intel Pentium 4 or equivalent processor
1 GB System RAM
ATI X800 series, Nvidia GeForce 6800 series, or higher video card

Minimum:

Windows XP
512MB System RAM
2 Ghz Intel Pentium 4 or equivalent processor
128MB Direct3D compatible video card
and DirectX 9.0 compatible driver;
8x DVD-ROM drive
4.6 GB free hard disk space
DirectX 9.0c (included)
DirectX 8.1 compatible sound card
Keyboard, Mouse
Supported Video Card Chipsets:

ATI X1900 series
ATI X1800 series
ATI X1600 series
ATI X1300 series
ATI X850 series
ATI x800 series
ATI x700 series
ATI x600 series
ATI Radeon 9800 series
ATI Radeon 9700 series
ATI Radeon 9600 series
ATI Radeon 9500 series
NVIDIA GeForce 7800 series
NVIDIA GeForce 6800 series
NVIDIA GeForce 6600 series
NVIDIA GeForce 6200 series
NVIDIA GeForce FX series