The Underdark is a fictional setting which has appeared in Dungeons & Dragons role-playing campaigns and Dungeons & Dragons-based fiction books, including the Legend of Drizzt series by R. A. Salvatore. It is described as a vast subterranean network of interconnected caverns and tunnels, stretching beneath entire continents and forming an underworld for surface settings. Polygon called it "one of D&Ds most well-known realms".
The Underdark is a fictional setting which has appeared in Dungeons & Dragons role-playing campaigns and Dungeons & Dragons-based fiction books, including the Legend of Drizzt series by R. A. Salvatore. It is described as a vast subterranean network of interconnected caverns and tunnels, stretching beneath entire continents and forming an underworld for surface settings. Polygon called it "one of D&Ds most well-known realms".
==Use in campaign settings== The Underdark featured prominently in the campaign settings World of Greyhawk and the Forgotten Realms. The concept of a dungeon that spanned a planet was first introduced by Gary Gygax in his D-series of game modules and at the end of the G-series. The Underdark was described in detail in the 1986 manual ''Dungeoneer's Survival Guide, by Doug Niles. It was also part of the Eberron campaign setting, in which it was called Khyber and was home to evil beings driven deep into the caverns at the end of the age of demons. Wolfgang Baur, who previously wrote the Underdark adventure Kingdom of the Ghouls for the Greyhawk setting, also introduced the Underdark in Empire of the Ghouls to the third-party Midgard setting from Kobold Press.
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