A Dungeons & Dragons setting, originally developed by Gary Gygax by amalgamating his and his friends' campaign worlds. As a result, it's often thought of as the "default" setting, to the point where, when the core rulebooks for Dungeons & Dragons have any flavor at all, it's generally Greyhawk-related flavor.The setting is named after the great Free City of Greyhawk, a sprawling metropolis that lies at the heart of the Flanaess, a continent on the world of Oerth, as well as Castle Greyhawk, a legendary dungeon that lies outside the city. Ravaged by centuries of warfare, contested by dozens of races and organizations, the Flanaess is crawling with monsters to slay, ruins to loot, and vile magicians to foil. A very generic high fantasy setting, but one which suits the game's needs perfectly. In the Planescape and Spelljammer settings, the world of Greyhawk is part of a larger universe that also includes Dragonlance and Forgotten Realms.Greyhawk was originally introduced as an optional supplement, Supplement 1: GREYHAWK, by Gary Gygax and Robert J. Kuntz, in 1975. Unlike later setting material, Supplement 1: GREYHAWK focused on optional rules as opposed to towns, monsters, etc. The rules introduced for Greyhawk evolved into Advanced Dungeons & Dragons, and Greyhawk remained the default setting until the release of Fourth Edition. During this time, numerous setting supplements, magazine articles, and adventure booklets were released for the setting, including Temple of Elemental Evil and Tomb of Horrors.There have been several Greyhawk novels, but the line never reached the same level of success as D&D's Dragonlance and Forgotten Realms franchises. Perhaps the most notable was the "Gord the Rogue" series by Gary Gygax, the tales of a dashing burglar from the City of Greyhawk.More recently, Mirrorstone Books published The Knights of the Silver Dragon, which takes place in the Greyhawk city of Curston.The fate of the Greyhawk setting under current canon is uncertain at best. While officially it has been discontinued, the Dungeons & Dragons franchise has dropped and revived settings in the past. Furthermore, the "look and feel", as well as many innovations introduced for the setting, such as the Paladin class and the Beholder and Dark Elf races, remain part of Fourth Edition.
The World of Greyhawk contains examples of the following tropes: