Minimum: Microsoft Windows 2000, XP, Pentium 3 1.0Ghz or Athlon XP Equivalent, 256MB RAM, 100% DirectX 9.0c -compatible 64 MB 3D Accelerated Card with TnL (GeForce 3Ti / Radeon 9 series), Microsoft Windows 2000/XP compatible sound card (100% DirectX 9.0c -compatible), 9.9GB free disk space, 100% Windows 2000/XP compatible mouse and keyboard Recommended: Pentium 4 2.0Ghz or Athlon XP Equivalent, 512MB RAM, 100% DirectX 9.0c -compatible 256MB 3D Accelerated Card (Nvidia GeForce 5900 / Ati 9800XT), Microsoft Windows 2000/XP compatible sound card (100% DirectX 9.0c -compatible), 9.9GB free disk space Optimal: Pentium 4 3.0Ghz or Athlon XP/64bit Equivalent, 1GB RAM, 100% DirectX 9.0c -compatible 512 MB 3D Accelerated Card (Nvidia GeForce 7800 / Ati X-1800)