Underworld: Endless War is a 2011 American anime-influenced adult animated anthology film consisting of a collection of three short tie-in stories, whose creation was supervised by Len Wiseman, director of the first two Underworld films. Each film tells a different story, and takes place during different periods of history to highlight new events within the Underworld mythology. The stories also help set up the events in the next film in the series, Underworld: Awakening (2012).

These shorts were released on December 20, 2011, as a part of the new Underworld Trilogy: The Essential Collection for Underworld on Blu-ray. It is also available on YouTube. Each episode is just over five minutes long.