System Requirements

OS: Microsoft Windows XP, Windows Vista and Windows 7 (Windows 95/98/ME/2000 are unsupported)

Processor: Intel Pentium 4 3.2 GHz or AMD Athlon 64 3200+ processor or better supported

Memory: 1 GB RAM

Graphics: 256 MB NVIDIA GeForce 6600GT or better or ATI Radeon 1600XT or better
DirectX: Microsoft DirectX(R) 9.0c

Screen Size:Anything bigger than a poxy 15" monitor

Hard Drive: 12GB of free hard drive space

Sound: 100% DirectX 9.0c compatible sound card

Internet: Broadband connection required for Multiplayer Connectivity. Internet Connection required for activation

Taken from here