OS: XP SP2 / Vista SP1 / Windows 7 CPU: For XP 2.0 GHz P4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz P4 processor or equivalent RAM: For XP 1 GB RAM / Windows Vista and Windows 7 1.5 GB RAM Hard Drive: At least 7.1GB 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