Several fictional universes exist in science fiction that serve as backstage for novels, short stories, motion pictures and games. This list includes: * The Alex Benedict universe by Jack McDevitt * The Alien Legion universe by Carl Potts, Alan Zelenetz, and Frank Cirocco * The Alliance-Union universe by C. J. Cherryh * The Alien Nation universe by Rockne S. O'Bannon * The Babylon 5 universe, by J. Michael Straczynski * The BattleTech universe, originally created by Jordan Weisman and Patrick Larkin and fleshed out by a multitude of other authors including Michael A. Stackpole, William H. Keith, Jr., Blaine Lee Pardoe, and Loren L. Coleman * The Battlestar Galactica universe by Glen A. Larson. * The Blade Runner universe by Philip K. Dick * The Bolo universe by Keith Laumer. * Th