Windows
OS: (64 bit only at present) Windows 7 SP1 (must have KB 2670838 installed) / Windows 8 / Windows 8.1 Processor: 2.3+ GHz Memory: 4 GB RAM Graphics: DX11 with Feature Level 11, SM5 DirectX: Version 11 Hard Drive: 2 GB available space Additional Notes: Supported chipsets: NVIDIA 470 GTX, AMD HD6850 or greater. Laptop versions of these chipsets may not be supported. Updates to your video and sound card drivers may be required. We'll be constantly updating the game to lower the required specs, so bear with us if your machine is struggling.