Required: Internet connection required to install and play. OS: Windows XP SP3 / Vista SP1 / Windows 7 Processor: Intel Core 2 or better / AMD 64 X2 or better Memory: 1 GB for XP / 1.5 GB for Vista and Windows 7 Hard Drive: At least 10 GB of free space DVD-ROM: 8x Speed Video Card: 256MB RAM with support for shader model 3* Sound Card: Direct X 9.0c compatible DirectX: Version 9.0c (included) Online: 2 – 10 Players Input: Keyboard, Mouse, VOIP headset