Windows
OS: XP SP2 / Vista SP1 / Windows 7
CPU:For Windows Vista and Windows 7: 2.4 GHz P4 processor or equivalent, For XP: 2.0 GHz P4 processor or equivalent
RAM: For XP 1 GB RAM / Windows Vista and Windows 7 1.5 GB RAM*
Hard Drive: At least 3.5 GB** of hard drive space with at least 1 GB additional space for custom content and saved games.
Video: 128 MB Video Card with support for Pixel Shader 2.0