Example image of eyePlorer eyePlorer map for 'History of massively multiplayer online games': Massively multiplayer online game Maze War First-person shooter ARPANET Massachusetts Institute of Technology Serial cable Adventure game Colossal Cave Adventure Digital Equipment Corporation PDP-10 William Crowther Don Woods Dungeon Master Zork Fortran Porting Roy Trubshaw University of Essex BCPL C (programming language) Richard Bartle MUD1 Bulletin board system CompuServe Modem Online service provider Personal computer Brad McQuaid Brian Green (game developer) J. Todd Coleman Mark Jacobs (video game designer) Raph Koster Mainframe computer PLATO (computer system) Spasim Moria (PLATO) Avatar (computer game) University of Illinois at Urbana-Champaign 2.5D Plasma display DOS OpenVMS Unix Island of Kesmai Kelton Flinn Roguelike Club Caribe Commodore 64 Habitat (video game) LucasArts