OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Intel Core 2 Duo @ 2.2 Ghz / AMD Athlon 64 X2 4600+ (Recommended) Intel Core 2 Duo @ 3.0 GHz / AMD Athlon 64 X2 6000+ Memory: (Minimum) 1 GB RAM (Windows XP) / 2 GB (Windows Vista and Windows 7) (Recommended) 2 GB for Windows ® XP, 4 GB for Vista / Windows ® 7 Video Memory:(Minimum) 512 Mb @ nVidia GeForce 8600 / ATI Radeon HD 2600/ (Recommended) 1 Gb @ nVidia GeForce GTX 260 / ATI Radeon HD 4870 HDD : 7 GB of free Hard Drive Space/ Sound Card: compatible with DirectX 9.0c