OS: Windows XP (with SP3)or Windows Vista (with SP1) Processor: Intel Pentium 4 3.2 Ghz, Intel Pentium D 2.66 Ghz, AMD Athlon 64 3500+ or better Memory: 1 GB Windows XP / 2 GB Windows Vista Graphics: 256 MB DirectX 10.0® compliant video card or DirectX 9.0c® compliant card with Shader Model 3.0 or higher DirectX®: DirectX 9.0c or greater Hard Drive: 4GB Sound: DirectX 9.0c Compatible Sound Card