Editing Greyhawk (section)

====''25th anniversary of D&D''====
The year 1999 marked twenty-five years since the publication of the original ''Dungeons & Dragons'' rules, and WotC sought to lure older gamers back to Greyhawk by producing a series of nostalgia-tinged ''Return to...'' adventures that evoked the best-known Greyhawk modules from 20 years before, under the banner ''25th Anniversary of D&D'':
* ''[[Return to the Tomb of Horrors]]'', by [[Bruce R. Cordell]], reprinted Gary Gygax's [[Tomb of Horrors|S1 ''Tomb of Horrors'']], and added a substantial expansion.
* ''[[Return to the Keep on the Borderlands]]'', by [[John D. Rateliff]], took Gary Gygax's 1979 module, [[Keep on the Borderlands|B2 ''Keep on the Borderlands'']] and restocked it with fresh monsters, as if the twenty years that had passed since the original module's publication also equaled twenty years of game time. Although the original had been in a generic setting, the new adventure set the Keep in Greyhawk.
* ''[[Return to White Plume Mountain]]'', by [[Bruce R. Cordell]], likewise updated Lawrence Schick's twenty-year-old adventure, ''[[White Plume Mountain]]'', by advancing the storyline twenty years.
* ''[[Against the Giants: The Liberation of Geoff]]'', by Sean K. Reynolds, included the full text of Gygax's three original 1979 ''Giant'' modules and details of eighteen new adventure sites in [[Geoff (Greyhawk)|Geoff]], linked together as an integrated campaign.
* ''[[Slavers (Dungeons & Dragons)|Slavers]]'' by Sean K. Reynolds and Chris Pramas, was a sequel to the original [[Scourge of the Slavelords|A1-4 ''Scourge of the Slavelords'']] series, set ten years after the original adventures.
* ''[[Return to the Temple of Elemental Evil]]'', by Monte Cook, returned the players to Gygax's infamous temple, which Rob Kuntz (as Robilar) had originally looted and wrecked. It was published in 2001, using the 3rd edition rules.

In conjunction with the publication of the ''Return to'' adventures, WotC also produced a series of companion novels known as the ''Greyhawk Classics'' series: ''Against the Giants'',<ref>{{cite book | last = Emerson | first = Ru | title = Against the Giants | publisher = Wizards of the Coast | date = July 1999 | location = Renton WA | isbn = 0-7869-1379-7}}</ref> ''White Plume Mountain'',<ref>{{cite book | last = Kidd | first = Paul | title = White Plume Mountain | publisher = Wizards of the Coast | date = October 1999 | location = Renton WA | isbn = 0-7869-1424-6}}</ref> ''Descent into the Depths of the Earth'',<ref>{{cite book | last = Kidd | first = Paul | title = Descent into the Depths of the Earth | publisher = Wizards of the Coast | date = June 2000 | location = Renton WA | isbn = 0-7869-1635-4}}</ref> ''Expedition to the Barrier Peaks'',<ref>{{cite book | last = Green | first = Roland J. | title = Expedition to the Barrier Peaks | publisher = Wizards of the Coast | date = November 2000 | location = Renton WA | isbn = 0-7869-1656-7}}</ref> ''[[The Temple of Elemental Evil (novel)|The Temple of Elemental Evil]]'',<ref>{{cite book | last = Reid | first = Thomas M | title = [[The Temple of Elemental Evil (novel)|The Temple of Elemental Evil]] | publisher = Wizards of the Coast | date = May 2001 | location = Renton WA | isbn = 0-7869-1864-0}}</ref> ''Queen of the Demonweb Pits'',<ref>{{cite book | last = Kidd | first = Paul | title = Queen of the Demonweb Pits | publisher = Wizards of the Coast | date = October 2001 | location = Renton WA | isbn = 0-7869-1903-5 | url = https://archive.org/details/queenofdemonwebp00kidd}}</ref> ''[[Keep on the Borderlands (novel)|Keep on the Borderlands]]'',<ref>{{cite book | last = Emerson | first = Ru | title = [[Keep on the Borderlands (novel)|Keep on the Borderlands]] | publisher = Wizards of the Coast | date = November 2001 | location = Renton WA | isbn = 0-7869-1881-0}}</ref> and ''[[The Tomb of Horrors (novel)|The Tomb of Horrors]]''.<ref>{{cite book | last = Strohm | first = Keith Francis | title = The Tomb of Horrors | publisher = Wizards of the Coast | date = February 2002 | location = Renton WA | isbn = 0-7869-2702-X | url = https://archive.org/details/tombofhorrors00stro}}</ref>

In an attempt to attract players of other ''D&D'' settings, WotC released ''[[Die, Vecna, Die!]]'', by Bruce R. Cordell and Steve Miller, a three-part adventure tying Greyhawk to the ''[[Ravenloft]]'' and ''[[Planescape]]'' campaign settings. Published in 2000, it was the last adventure to be written for ''D&D'''s 2nd edition rules.