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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 a literal underworld for whichever surface setting it is added to.

Use in campaign settings[edit]

The Underdark is featured prominently in the campaign settings World of Greyhawk[1] and the Forgotten Realms.[2] The concept of a dungeon that spanned a planet was first introduced by Gary Gygax in his D-series of game modules[3] and at the end of the G-series. The Underdark is described in detail in the 1986 manual Dungeoneer's Survival Guide, by Doug Niles.[4] It is also a part of the Eberron campaign setting, in which it is called Khyber and is home to a host of evil beings driven deep into the caverns at the end of the age of demons.[5]

A review for Pyramid refers to the Underdark as "one of the most well known facets of the Forgotten Realms".[6] Much of the literary attention for this deep underworld setting stemmed from the sourcebooks and accessories for the Forgotten Realms setting, including [2] R.A. Salvatore's novels about the fictional character Drizzt Do'Urden.

The Underdark is also the setting for the expansion pack to the computer game Neverwinter Nights called Hordes of the Underdark, which features the port city of Lith My'athar, and the mysterious Seer.[7]


The Underdark is described as "a vast subterranean realm inhabited by drow, mindflayers, aboleth, and other strange, sinister creatures. It is a place where few humans go and from where even fewer return".[4] It extends well past the dungeons made by surface dwellers, encompassing all the myriad caverns, tunnels and complexes that exist for all intents as a parallel world beneath the surface.[6]

The fictional Underdark's physical characteristics are based heavily upon conditions in real-world caverns deep underground, only at immense size.


Within the context of a game, the Underdark is extremely dangerous, especially to non-native characters and creatures. There are the usual dangers associated with caverns: claustrophobia, occasional poor air circulation, and getting lost. Cave floor and ceiling collapses are also a hazard.

There is no light except for occasional patches of phosphorescent fungus; most Underdark inhabitants either have highly developed senses other than sight or have developed Darkvision.[note 1] Food can be extremely difficult to find, and much of the natural vegetation is poisonous. In addition, potable water is seldom easy to locate.

In the Forgotten Realms setting, the Underdark is permeated with a magical energy the Drow call faerzress, which is used as a source of energy by the native plant life but which interferes with scrying and teleportation spells.


In the Forgotten Realms setting, Araumycos (Dwarvish, literally meaning "Great Fungus") is an enormous fungal growth in the Upper Underdark under the continent of Faerûn. It is a single organism existing in the region beneath the High Forest, beginning at a depth of one mile under the surface and ending at a depth of three miles. It is immune to magic and greatly resistant to psionic energy. Araumycos will sometimes attack intruders with poison, spores, and manifestations that resemble oozes and slimes.[2]

Araumycos houses many fungal creatures of all varieties. Travel within Araumycos is difficult, as the fungus regenerates quickly. Many passages and caves are blocked by the fungal growths.[2]


The Underdark is home to many predators and a wide array of races and fantasy monsters, most of which are hostile. These races include:

There is no unified underground government, although there are individual city-states, each with varying forms of rule. The Underdark economy primarily deals in armor, exotic goods, magic, slaves, timber and weapons. The ethical code of many indigenous races tends toward evil or indifferent behaviors.

In the Forgotten Realms campaign setting, R.A. Salvatore created the fictional Underdark city Menzoberranzan.[8] This city is controlled by the drow.


Source books[edit]

Game modules[edit]

Computer games[edit]

Parts of the Baldur's Gate series of computer games feature journeys through the Underdark, as did Icewind Dale II. An expansion pack based on the Underdark setting was released as part of Neverwinter Nights game series, titled Neverwinter Nights: Hordes of the Underdark. The tilesets which came with the Hordes of the Underdark expansion pack were utilized in several persistent worlds, most notably Escape from the Underdark.

Part of Baldur's Gate II: Shadows of Amn takes place in the Underdark.[9]

See also[edit]


  1. ^ This was infravision before the 3rd edition of the game rules.


  1. ^ Mona, Erik; Holian, Gary; Reynolds, Sean K.; Weining, Frederick (2000). Living Greyhawk Gazetteer. Wizards of the Coast. ISBN 0-7869-1743-1. 
  2. ^ a b c d Cordell, Bruce R.; Kestrel, Gwendolyn F. M.; Quick, Jeff (2003). Underdark. Wizards of the Coast. ISBN 0-7869-3053-5. 
  3. ^ a b Baichtal, John (February 26, 2010). "D&D’s Underdark Describes a Vast and Perilous Realm". Wired. Condé Nast Digital. Retrieved 2010-07-16. 
  4. ^ a b Bambra, Jim (October 1986). "Open Box". White Dwarf (Games Workshop) (82): 2. 
  5. ^ Wyatt, James; Baker, Keith; Johnson, Luke (January 2006). Player's Guide to Eberron. Wizards of the Coast. ISBN Player's Guide to Eberron Check |isbn= value (help). 
  6. ^ a b Pyramid Review
  7. ^ Lummis, Michael; Pleet, Kathleen; Kern, Edwin; Ricketts, Kurt; Burton, Christopher (2004). Neverwinter Nights: Hordes of the Underdark, Official Strategy Guide. Brady Games. ISBN 0-7440-0341-5. 
  8. ^ Jacob, Merle; Apple, Hope (2000). To be Continued: An Annotated Guide to Sequels. Greenwood Publishing Group. p. 251. ISBN 1-57356-155-X. 
  9. ^ Cappellini, Matt (November 30, 2000). "Blockbusters Make Christmas Bright". The Beacon News (Aurora, Illinois). Retrieved November 21, 2012.  – via HighBeam Research (subscription required)

Further reading[edit]

External links[edit]