Windows
OS: Windows® 7 64-bit / Windows® 8 64-bit / Windows® 8.1 64-bit Processor: Intel® Core™ i5-2500 @3.3 GHz / AMD FX-8320 @3.5 GHz Memory: 4 GB RAM DDR3 Hard Drive: 40 GB free space Graphics: NVIDIA® GeForce® GTX 560 / AMD Radeon™ HD 6870 (1GB VRAM) DirectX®: Version 11 Sound: DirectX® compatible Additional Notes: Laptop versions of graphics cards may work but are NOT officially supported.Windows-compatible keyboard, mouse, optional controller (Xbox 360 Controller for Windows recommended)