OS: Microsoft Windows XP SP3, Vista SP1, XP/Vista 64-Bit (Does not support Windows 95/98/ME/2000/NT) Processor: Intel Dual Core 2.0 GHz or AMD Athlon 4000+ Memory: XP – 1 GB RAM / Vista – 2 GB RAM Hard Disk Space: 5.5 GB + 1 GB Swap File Video Card: 3D Hardware Accelerator Card Required – 100% DirectX 9.0c compatible 256 MB Video Memory. ATI Radeon X1900 or Nvidia GeForce 7600 Sound Card: DirectX® 9.0c compatible sound card DirectX® Version: DirectX® 9.0c