Windows
OS: Windows XP Service Pack 3 
Processor: 1.7 GHz Dual Core 
Memory: 2 GB RAM 
Graphics: NVIDIA GeForce GTX 260, ATI Radeon 4870 HD, Intel HD 3000, or equivalent card with at least 512 MB VRAM 
DirectX: Version 9.0 
Hard Drive: 3 GB available space 
Sound Card: DirectX Compatible Sound Card 
Additional Notes: Must have OpenGL 3 with GLSL version 1.3