Windows
OS: Windows 7 64-bit Processor: Intel I5-2500K, AMD FX-8120 Memory: 6 GB RAM Graphics: 2GB of Video Memory & NVIDIA GeForce GTX 660, AMD Radeon HD7870 Storage: 50 GB available space Sound Card: DirectX Compliant Sound card Other Requirements: Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game)include nVidia PhysX_drivers 10.04.02_9.10.0522and nVidia GPU drivers 197.13 or latest, Steam Client and Microsoft DirectX. Additional Notes: Windows 8.1 users may need additional Windows Update files: PleaseClick here for information