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 predated it by over a year—the world of Greyhawk closely identified with early development of the game beginning in 1972, and after being published it remained associated with Dungeons & Dragons publications until 2008. The world itself started as a simple dungeon under a castle designed by Gary Gygax for the amusement of his children and friends, but it was rapidly expanded to include not only a complex multi-layered dungeon environment, but also the nearby city of Greyhawk, and eventually an entire world. In addition to the campaign world, which was published in several editions over twenty years, Greyhawk was also used as the setting for many adventures published in support of the game, as well as for RPGA's massively shared Living Greyhawk campaign from 2000–2008. Setting The World of Greyhawk is located on a planet called Oerth. Oerth has an axial tilt of 30 degrees, which causes greater seasonal temperature variation than on Earth, which is controlled by wizardly and divine magic that shifts weather patterns to be more favorable to the populace. Castle Greyhawk was the most famous dungeon in Oerth, the home campaign world of Gary Gygax. Players in the earliest days of this campaign mostly stayed within Castle Greyhawk's dungeons, but Gygax envisioned the rest of his world as a sort of parallel Earth, and the original Oerth (pronounced 'Oith', as with a Brooklyn accent) looked much like the real-world Earth but filled with imaginary cities and countries. Several years later, when TSR produced the original World of Greyhawk folio (1980), Gygax was asked to produce a map of the world and decided to create something new which still featured many of the locales from his original world of Oerth but with new geography. Gygax also connected Dave Arneson's Blackmoor to his world by including a country by that name in Oerth. In his later novel Dance of Demons (1988), Gygax destroyed Greyhawk's Oerth and replaced it with a new fantasy world of Yarth. The Flanaess is the eastern part of the continent of Oerik, one of the four continents of Oerth, acting as the setting of dozens of adventures published between the 1970s and 2000s. In