recommended system requirements:

Operating System:  Windows 7 64 Bit

CPU: Intel Quad Core / AMD Phenom II X4

RAM: 4 GB

graphics card: Nvidia Geforce 8800GT // AMD Radeon HD 4850

storage: 22 GB

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minimal system requirements:

Operating System: Windows XP, Vista

CPU : Intel Dual Core // AMD Athlon 64 X2

RAM: 3 GB

graphics card: Nvidia Geforce 8600 GT // AMD Radeon HD 4600

storage: 22 GB