OS: Windows XP SP3, Windows Vista SP1, Windows 7 Processor: 2.0Ghz Dual core CPU (any Core 2 Duo or AMD X2 or better) Memory: 1GB (XP), 2GB (Vista), 2GB (Windows 7) Graphics: 256MB Video Card using Shader Model 3 (Nvidia GeForce 8800GT, AMD Radeon 3850 and above) DirectX®: 9.0c Hard Drive: 20 GB space free (10 GB free after install) Sound: Laptop and Notebook users will need to download the newest Nvidia 280.26 or AMD Catalyst 11.8 drivers.