Dungeons & Dragons was designed by two guys.
Dungeons & Dragons ( abbreviated as D&D or DnD ) is a fantasy tabletop role-playing game ( RPG ) originally designed by Gary Gygax and Dave Arneson , and first published in 1974 by Tactical Studies Rules , Inc. ( TSR ) . TSR (company) . When Gary Gygax could not find a publisher for D&D , a new type of game he and Dave Arneson were co-developing , Gygax and Don Kaye founded Tactical Studies Rules in October , 1973 , to self-publish their products .