Descent Into the Depths of the Earth is an adventure module for the Dungeons & Dragons fantasy roleplaying game coded D1–2. It was written by Gary Gygax, and combines two previously published modules
The cover of the 1981 Descent into the Depths of the Earth compilation module, with art by Jim Roslof. The artwork depicts a party of adventurers fighting a band of kuo-toa.
Greyhawk
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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
Supplement I: Greyhawk, written by Gary Gygax and Rob Kuntz, was an expansion of the Dungeon & Dragons rules that contained no material about the Greyhawk campaign world other than two brief references.
The box cover for World of Greyhawk Fantasy Game Setting boxed set (TSR, 1983).
Saga of Old City by Gary Gygax (TSR, 1985); cover art by Clyde Caldwell. The first Greyhawk Adventures novel, and the first featuring "Gord the Rogue".
Living Greyhawk Gazetteer (Wizards of the Coast, 2000), an updated sourcebook for the campaign setting.