Windows
OS: Windows XP SP2, Windows Vista, Windows 7
Processor: Pentium IV 3.2Ghz, or any dual core processor
Memory: 1GB (XP), 1.5GB (Vista), 1.5 GB (Windows 7)
Hard Disk Space: 8.5GB space free
Video Card: 128 MB Video Card using Shader Model 3 (Nvidia GeForce 6600 GT / ATI X1600)
Other: Online Steam Account