OS: Windows XP, Windows Vista, or Windows 7, 32 or 64-bit Processor: Intel Core 2 1.8GHz, AMD Athlon 2GHz, or better Memory: 1GB Graphics: NVIDIA® GeForce® 7600 or better, ATI Radeon® HD 2000 series or better, with 256MB video memory (512 MB recommended). Intel HD cards may hang up or have very low framerate. Video: OpenGL: 2.1 , GLSL: 1.2 Hard Drive: 100MB