Minimum:

OS: Windows XP, Windows Vista SP1 or Windows 7
Processor: 2.0Ghz Intel® Core™2 Duo Processor or AMD equivalent
Memory: 2GB
Graphics: NVIDIA 9800 GT 512 MB Video Card or AMD equivalent
DirectX®:
Hard Drive: 20 GB space free (10 GB free after install)
Sound:

Recommended:

OS: Windows 7
Processor: Any Quad-core AMD or Intel Processor
Memory: 2GB
Graphics: NVIDIA GeForce GTX 260 512MB Video Card or AMD equivalent
DirectX®:
Hard Drive: 20 GB space free (10 GB free after install)
Sound: