OS: Windows XP SP3/Vista/7 Processor: 1.8GHz Intel Core 2 Duo or *****alent AMD CPU Memory: 1 GB RAM (Windows XP) / 2 GB RAM (Windows Vista and Windows 7) Hard Drive: 5.4 GB Sound Card: DirectX 9.0c compatible Input: Keyboard / Mouse Video Card: 256 MB (with Pixel Shader 3.0) DirectX: 9.0c March 2009