OS: Windows® XP SP 2 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) [[Windows up to date and latest service pack installed]] CPU AMD/INTEL DUAL-CORE 2.2 GHZ Memory: 2 GB RAM (2 GB on Windows Vista or Windows 7) Video Memory: 256 MB 100% DIRECTX 9 AND SHADERS 3.0 COMPATIBLE. ATI RADEON HD 2600 XT/NVIDIA GEFORCE 7900 GTX OR HIGHER HDD: 7 GB of free Hard Drive Space