Minimum OS: Windows 95 OSR2, Windows 98, Windows 98SE, Windows ME, Windows NT 4.0 (with Service Pack 5), Windows 2000, Windows XP, Windows Vista or Windows 7 operating system Processor: AMD K6-3 400MHz, Pentium II or Celeron-A 300MHz Memory: 64MB Graphics: full OpenGL compliant 3D accelerator Hard Drive: 600MB free hard disk space Sound: 100% Windows compatible sound card