The game was significantly expanded in 1976 by Don Woods.
The objective of this sort of game is to slay monsters, explore a fantasy world, complete quests, go on adventures, create a story by roleplaying, and advance the created character.
Inspired by Adventure, a group of students at MIT in the summer of 1977 wrote a game for the PDP-10 minicomputer; called Zork, it became quite popular on the ARPANET.
Zork was ported, under the filename DUNGEN ("dungeon"), to FORTRAN by a programmer working at DEC in 1978.
Numerous graphical MUDs were created on the PLATO system at the University of Illinois and other American universities that used PLATO, beginning in 1975.
Among them were "pedit5", "oubliette", "moria", "avathar", "krozair", "dungeon", "dnd", "crypt", and "drygulch".