Windows 95 OSR2/98/ME/2000/XP * Pentium II or Athlon class 350 MHz or faster CPU (400 MHz recommended for multiplayer) * 64MB RAM, or 128 MB RAM required for Windows 2000 and XP * 16 MB 3-D accelerator with full OpenGL support * 4x CD-ROM drive * 665 MB of free hard drive space