OS: XP SP2 / Vista SP1 / Windows 7 Processor: For XP 2.0 GHz P4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz P4 processor or equivalent RAM: 2 GB Hard Drive: 4.5 GB available space Video Card: 128 MB Video Card with support for Pixel Shader 2.0 DirectX: Version 9.0c