OS: Windows Vista, Windows 7 with latest Service Packs Processor: 2.66 GHz Intel Core 2 Quad Q8400, 3.0 GHz AMD Phenom II X4 940 Memory: 4 GB RAM Graphics: nVidia GTX 260, ATI Radeon HD 5770 DirectX: Version 9.0 Network: Broadband Internet connection Hard Drive: 25 GB available space