REQUIREMENTS Operating System: Microsoft Windows XP (SP3) / Windows Vista (SP1) / Windows Processor: Pentium 4 3 GHz or Athlon 3400 + Memory: 1 GB (2 GB for Vista/Se7en) Video: GeForce 7800GTX or Radeon X1900 / GeForce 260 or Radeon 4850 Sound Card: DirectX 9.0c compatible Free hard drive space: 4 GB