OS: Windows 7 / Vista SP2 / XP SP3 Processor: Intel Pentium D Processor 3 GHz or AMD Athlon 64 X2 3800+ RAM: XP = 1GB, Vista/ Windows 7 =1.5GB Hard Drive: 10 GB available space Video Card: Direct X 9.0c compliant video card with 256MB RAM (NVidia 8800 GT or higher, ATI Radeon HD 3870 or higher). 3D Video card supporting Shaders 3.0. DirectX: Version 9.0c