Ug-Qualtoth

Ug-Qualtoth is an unknown hitherto entity, mentioned in Fallout 3 and Fallout: The Roleplaying Game.

Background
Ug-Qualtoth is an entity described by most as a "forgotten god," with those who worship it suggesting that this may not be the case. It is stated that only the "Screaming Sound of Ug-Qualtoth" can wield power of The Krivbeknih, a book which shares its origins Dunwich Obelisk. Richard Dunwich, founder of Dunwich Borers LLC, and his sibling Constance Blackhall, were worshippers of Ug-Qualtoth and were known for their "obsession with the occult." Two of their locations, the Dunwich Building in Washington, D.C. and Dunwich Borers in the Commonwealth, were being used as a grounds to uncover a "great monolith" related to Ug-Qualtoth.

Dunwich Borers LLC was also responsible for creating rock-tunneling drills, which were tested within one of their marble quarries. This quarry was the site of an ancient temple dedicated to dark gods, whose adherents practiced human sacrifice. Dunwich Borers LLC's abysmal record of human safety precautions, which often led to employee deaths, is stated by some to be an intentional move to "bring eldritch attention and supernatural powers" to corporate leadership as a form of modern sacrifice.

Underneath the Dunwich Building in Washington is a alter related to Ug-Qualtoth next to the Dunwich Obelisk, with all who attempted to investigate it either dying or "scraping together a day-to-day existence." Jaime Palabras, a Ghoul found near the alter, traveled to Dunwich Building in search of his father, who discovered a book bound in "odd black leather" and stamped with strange glyphs on an expedition. While he planned to sell it to Brotherhood of Steel Scribes, Jaime's father wound up in the Dunwich Building, vowing to return the book "to its source." His body and the book was discovered by Jaime, who noted that he was "becoming like [the zombies]" within the building and that the book was "warm against the stone."

Constance Blackhall's occultism extended to Point Lookout, where their family was involved in its commercialization during the early 21st century. Constance used the wealth from their brother's ventures to obtain many archaic texts and artifacts, including The Krivbeknih. Drawing from a small group of devotees, Constance formed a sect dedicated to the book. Constance survived during and after the Great War, with local legends accrediting Constance's long life to the book prior to being stolen, which coincided with their death.

Constance's descendent, Obadiah Blackhall, also worships Uq-Qualtoth. After discovering the Krivbeknih had made its way back to Point Lookout, he planned to repossess the book in order to restore power to his family back from the local Swampfolk, who think it holds an "occult power." Within their Ritual Site lies a sacrificial chamber, with the book lying on a ceremonial lectern. Antropologists postulated that the Swampfolk "have a belief in the occult" and that they pray to the "hitherto unknown entity" of Ug-Qualtoth.

Marcella, a missionary, traveled to Point Lookout to spread her faith. While there, Obadiah solicited her to find the book, which she investigated further, recognizing its name and declaring that it must be destroyed. During the quest The Dark Heart of Blackhall, the Lone Wanderer is tasked with destroying the book by pressing it against the Dunwich Obelisk next to the Ug-Qualtoth alter underneath the Dunwich Building.

Appearances
Ug-Qualtoth is mentioned in Fallout 3 and Fallout: The Roleplaying Game.

Behind the scenes

 * In the Fallout 3 game files, there is unused bloody drawing of the Ug-Qualtoth statue from the Dunwich Building.
 * The quote "Ug-Qualtoth knows the gate. Ug-Qualtoth is the gate. Ug-Qualtoth is the key and guardian of the gate!" from the Fallout 3 Official Game Guide is a reference to the quote, "Yog-Sothoth knows the gate. Yog-Sothoth is the gate. Yog-Sothoth is the key and guardian of the gate. Past, present, future, all are one in Yog-Sothoth." from the H.P. Lovecraft book, The Dunwich Horror.