Windows '98, ME, XP, and Win2000.;Pentium III 500 MHz (or Athlon 500), 128 MB of RAM, 16 MB 3D hardware graphics card, 800MB HDD space, 8x CD-ROM, 56K for online play. The recommended system is a Pentium III 800 MHz or greater, 128MB of RAM or more, 32 MB 3D hardware graphics card, 800MB HDD space, 16x CD-ROM, DSL/Cable or other high speed internet connection for online play.