OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Intel Dual Core 1.8GHz (or higher) or AMD Athlon II X2 (or higher) (Recommended) Intel Core2 Duo 2.60GHz (or higher) or AMD Phenom II X2 (or higher). 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) DirectX 9.0c / Shader3.0 or higher compatible nVidia GF6600 (or higher) or ATi X1600 (or higher) with 256MB of RAM (Recommended) DirectX 9.0c / Shader3.0 or higher compatible nVidia GF8800 (or higher). HDD : 10 GB of free Hard Drive Space