OS: Windows XP SP3 / Vista SP1, Win 7 Processor: 1.8 GHz Intel Core 2 Duo (equivalent AMD CPU) RAM: 1GB for XP / 2GB RAM for Vista / Win 7 Hard Drive: 15 GB of free space Video: 256 MB* (with Pixel Shader 3.0 Support) Sound: DirectX 9.0c compatible DirectX: DirectX 9.0c August 2009 (included) * Supported chipsets: NVIDIA 7900 or better; ATI X1800 or better. Please note that NVIDIA GeForce 9300, 8500, 8400, and 8300 are below minimum system requirements, as are AMD/ATI Radeon HD3200, HD3300, and HD4350. Updates to your video and sound card drivers may be required.