OS: Windows XP SP2/Vista/7 Processor: AMD Athlon 3500+ or Intel Pentium IV 3.4 Ghz Memory: 1Gb RAM (XP) 1.5Gb RAM (Vista/7) Graphics: Nvidia 6600 (256Mb) / ATI Radeon X700 (256Mb) DirectX®: 9.0c or higher Hard Drive: 8 Gb of free space Sound: DirectX 9-compliant sound card