Minimum OS: Windows XP or Windows Vista Processor: 2.5Ghz Intel P4 or AMD Ahtlon processor Memory: 512MB RAM Graphics: NVIDIA Geforce 6600GT with 256MB VRAM Pixel Shader 2.0 or ATI Radeon x800 with 256MB RAM Pixel Shader 2.0 DirectX®: DirectX 9.0c Hard Drive: 6 GB Sound: OpenAL sound compatible audiocard