OS: Windows XP / Vista/ 7 Processor: Intel Pentium 4 (or equivalent) running at 1.7 GHz or greater Memory: 1 GB of ram, 1.5 GB (Vista and Windows 7) Graphics: ATI Radeon X1800 GTO 256MB / Nvidia GeForce 6800 Ultra 256MB DirectX: Version 9.0c (Included) Hard Drive: at least 2 GB of free space Sound: Direct X 9.0c compatible