Gygax wrote the AD&D hardcovers Players Handbook, Dungeon Masters Guide, Monster Manual, and Monster Manual II. He also wrote or co-wrote many AD&D and basic D&D adventure modules, including The Keep on the Borderlands, Tomb of Horrors, Expedition to the Barrier Peaks, The Temple of Elemental Evil, The Forgotten Temple of Tharizdun, Mordenkainen's Fantastic Adventure, Isle of the Ape, and all seven of the modules later combined into Queen of the Spiders. In 1980, Gygax's long-time campaign setting Greyhawk was published in the form of the World of Greyhawk Fantasy World Setting folio, which was expanded in 1983 into the World of Greyhawk Fantasy Game Setting boxed set. Sales of the D&D game reached $8.5 million in 1980. Gygax also provided assistance on the Gamma World science fantasy role-playing game in 1981 and co-authored the Gamma World adventure Legion of Gold.
Gygax wrote the AD&D hardcovers Players Handbook, Dungeon Masters Guide, Monster Manual, and Monster Manual II. He also wrote or co-wrote many AD&D and basic D&D adventure modules, including The Keep on the Borderlands, Tomb of Horrors, Expedition to the Barrier Peaks, The Temple of Elemental Evil, The Forgotten Temple of Tharizdun, Mordenkainen's Fantastic Adventure Isle of the Ape, and all seven of the modules later combined into Queen of the Spiders In 1980, Gygax's long-t.ime campaign setting Greyhawk was published in the form of the World of Greyhawk Fantasy World Setting folio, which was expanded in 1983 into the World of Greyhawk Fantasy Game Setting boxed set. Sales of the D&D game reached $8.5, million in 1980. Gygax also provided assistance on the Gamma World science fantasy role-playing game in 1981 and co-authored the Gamma World adventure Legion of Gold.