PEDIT5 was perhaps the first dungeon-crawl video game, written in 1975 by Rusty Rutherford for the PLATO system. Like all PLATO software, the game was executed on a mainframe computer, but played on terminals located elsewhere. In the game, the player guides a character who wanders a single-level dungeon accumulating treasure and killing monsters. When a player encounters a monster, he can use one of several spells. Characters can be saved from one play session to the next...