OS: Windows XP (SP3) or Windows Vista (SP1) or Windows 7 Processor: Intel Core 2 Single 1.6 Ghz Processor (or equivalent) or AMD 64 2.0 GHz Processor (or equivalent) Memory: 1GB (1.5 GB Vista and Windows 7) Graphics: ATI Radeon X850 256MB or NVIDIA GeForce 6600 GT 128MB or greater (Windows Vista: Radeon X1550 256 MB or NVidia GeForce 7600GT 256MB) DirectX®: DirectX (November 2007) Hard Drive: 20 GB HD space Sound: Direct X Compatible Sound Card