Claim: Dungeons & Dragons was designed by two guys.
Evidence: Dungeons & Dragons -LRB- abbreviated as D&D or DnD -RRB- is a fantasy tabletop role-playing game -LRB- RPG -RRB- originally designed by Gary Gygax and Dave Arneson , and first published in 1974 by Tactical Studies Rules , Inc. -LRB- TSR -RRB-.
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.