Minimum System Requirement : - OS : Windows XP SP2 and SP3/Windows Vista - CPU : 3.2 GHz Intel Pentium 4 or 2.66 GHz Pentium D/AMD Athlon64 3500+ - RAM : 1.oGB (2 GB recommended) - HDD : 4 GB of free space - VGA : 256 MB DirectX 10.0/9.0-compliant with Shader Model 3.0