Crestus Prime is a Garrison World with a Service Base and a fleet of large cargo transports, used for transporting disabled Frigates from the four Crestus Garrison Worlds nearby. The location of Crestus Prime is known only to top level military personnel of Alexandria, and is only placed in the Navigation Computers of ships assigned specifically to the system. The world itself holds only the Service Base and its supporting community, with a total population of 30,000, all of them members of the military.
Crestus Prime has become the hub of the Alexandria space defense system. From here, the space fleet can reach any of the four Garrison Worlds which protect the approach to Ventix. This constantly threatens any ICC forces trying to clear the Crestus Garrison Worlds, and provides support for Ventix if the ICC ever gets that far. It is unlikely that it will ever come to that, since the ICC has decided to use a blockade to defeat Alexandria. The presence of Crestus Prime was a major factor in that decision.Aliens Adventure Game (1991), Leading Edge Games