Windows
OS: Windows XP SP3
Processor: 2.4 GHz Dual Core Processor
Memory: 2 GB RAM
Graphics: NVIDIA GeForce 8500 /ATI Radeon HD 2600
Hard Drive: 13 GB available space
Sound Card: DirectX 9.0c compatible
Additional Notes: Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game) include Steam Client, DirectX 9, Microsoft .NET 4 Framework, Visual C++ Redistributable 2005, Visual C++ Redistributable 2008, Visual C++ Redistributable 2010, and AMD CPU Drivers (XP Only/AMD Only)