Greyhawk, also known as the World of Greyhawk, is a fictional world designed as a campaign setting for the Dungeons & Dragons fantasy roleplaying game. Although not the first campaign world developed for Dungeons & Dragons—Dave Arneson’s Blackmoor campaign predates it by a few months—the world of Greyhawk was the setting most closely identified with the development of the game from 1972 until 2008.