Greyhawk is a fantasy campaign setting for the Dungeons & Dragons role playing game, originally developed by Gary Gygax as a setting for his early role playing game Chainmail, the medieval themed role playing game that later morphed into Dungeons & Dragons role playing game when merged with Dave Arneson's more fantasy oriented Role Playing Setting Blackmoor in the 1970s. The World of Greyhawk published in 1980 was the second campaign setting published by TSR; however it the setting most identified with early development of Dungeons & Dragons.
Greyhawk was initially conceived by Gary Gygax as an underground dungeon oriented adventure for his group of friends which over time expanded to become a multi-layered underground complex near the city of Greyhawk, from which the campaign setting takes its name. Gary Gygax continued expanding the world to include the lands surrounding city of Greyhawk and finally the continent and the fictional world of Oerth in its entirety.
Integration into Dungeons & Dragons Online
Turbine has not officially licensed the Greyhawk Intellectual Property, 'IP', from Hasbo/Wizards of the Coast. Currently a number of older Pen and Paper modules that were set in Greyhawk Campaign Setting have been licensed and brought to DDO and placed in a generic unnamed world. With a large number of players familiar with the original pen and paper modules they are assumed to be Greyhawk.
The Temple of Elemental Evil, as a part of Update 25, is the first of the older modules placed in a non-named world. The story line from the classic module Scourge of the Slave Lords was added to DDO in Update 32.
As of September 2016 there are no public instances nor Wilderness Adventure Areas set in the unnamed world that players assumed to be Greyhawk Campaign Setting. All quests are accessed via dimension gate in the Halls of Heroes.