Ouroboros

Ouroborus is a village in Western Utah. It is where Hecate, the mad tribal "goddess" resides, as well as the Vipers, a group of raiders from the West who serve her.

Appearances in games
Ouroborus did not appear nor was mentioned in any of the published games, but was to appear in the cancelled Fallout 3 project by Black Isle codenamed Van Buren. It is not certain if it will appear in any future Fallout game.