OS: Windows 7/8/8.1 (64-Bit) Processor: Intel® Core™ i3-530 @ 2.93 GHz / AMD Phenom™ II X4 810 @ 2.80 GHz RAM: 6 GB Hard Drive: 55 GB available space Video Card: NVIDIA® GeForce® GTS 450 @ 1 GB / ATI® Radeon™ HD 5870 @ 1 GB Sound Card: DirectX 9.0c compatible sound card DirectX: Version 11