MINIMUM OS: Windows Vista SP1 / Windows 7 CPU: 1.8 GHz Core 2 Duo RAM: 2GB RAM for Windows Vista & Windows 7 Hard Drive: 8.0 GB Video: 3D accelerated 256 MB video card with support for Pixel Shader 3.0 Minimum Supported Video Cards: ATI Radeon HD 3600, NVIDIA GeForce 6800GT RECOMMENDED OS: Windows Vista SP1 / Windows 7 CPU: Intel Core 2 Quad Q6600 2.4g / AMD Athlon II X4 600e 2.2g RAM: 2GB RAM for Windows Vista & Windows 7 Hard Drive: 8.0 GB Video: Nvidia 8800 GT / ATI Radeon HD 4650 DirectX: 9.0c Input: Keyboard, Mouse, Dual Analogue gamepad, VOIP Headset Online Multiplayer: 2-22 players, 512 kbits/sec or faster Single System Multiplayer: 2-5 players on 1 PC