Greyhawk

Template:Infobox RPG Greyhawk, also known as the World of Greyhawk, is a campaign setting for the Dungeons & Dragons roleplaying game. The World of Greyhawk includes the Free City of Greyhawk, from which the name was taken. As one of the earliest of the D&D campaign settings, many of the rules for the game itself were developed in conjunction with game play by Gary Gygax and others in and around Castle Greyhawk and its dungeons. While constructing the milieu, Gygax also incorporated the campaign worlds of his fellow role-players, such as Blackmoor (Dave Arneson's campaign) and the Lendore Isles (a region created by long-time stalwart Len Lakofka).

Dungeons & Dragons has always had a tenuous connection between the core rules and any particular, well-defined setting. Through all editions of the game however, Greyhawk has had a strong influence over the core rules, including providing names for many well-known spells and magic items. The current rules contain deities and many other elements that define a general setting which is called the "Core Setting." The Core Setting is, in turn, largely based on Greyhawk, containing many of the same deities and geography. Indeed, a small map of the continent of Oerik, in relief as if sculpted out of a metal sphere, is in the center of the cover art for the Dungeon Master's Guide, 3.5th edition.