Windows OS:Â Windows 7(64bit) Processor:Â Core2Duo 2.66 GHz Memory:Â 4 GB RAM Graphics:Â DirectX 10.x or OpenGL 3.3 or better graphics card with 1 GB RAM and support for v4 shaders DirectX:Â Version 10 Hard Drive:Â 7 GB available space Sound Card:Â DirectX 9.0c compatible sound card Additional Notes:Â Caution: ATI Mobility Radeon HD 5xxx, 1GB VRAM 5000 series may not work properly with this game.