Minimum: OS: Windows XP Processor: Core 2 Duo / Athlon X2, at least 2 GHz Memory: 2 GB RAM Graphics: ATI Radeon 2400 or better / NVIDIA GeForce 8600 or better Hard Drive: 1500 MB HD space Sound: OpenAL compatible Additional Notes: 3 button mouse or Xbox 360 controller recommended. Requires OpenGL drivers.