Minimum: OS: Windows Vista® (with Service Pack 2)/ Windows 7® (with Service pack 1), both 32 bit & 64 bit versions. Processor: Intel Pentium D 3.0 Ghz or AMD Athlon64 X2 4400+ 2.2Ghz Memory: 2GB Windows Vista or Windows 7 Graphics: 512 MB DirectX–compliant, Shader 4.0–enabled video card based on nVidia GeForce 8600 GTS/AMD Radeon HD 4650 DirectX®: DirectX 11 Hard Drive: 25 GB Sound: DirectX 11 – compliant sound card