1994 first-person shooter video game by Bungie (who later went on to make the money-printingly popular Halo series) concerning a nameless security officer fighting his way through his alien-infested colony ship around Tau Ceti with the help and hindrance of several deteriorating and/or insane artificial intelligences.

The game spawned two sequels which expanded on the AIs' characters, as well as the backstory behind the alien invasion, etc.  It also spawned quite a bit of fan fiction, mod, analysis, and speculation, and has been remembered among enthusiasts for its story (more interesting than most video games'), in addition to the fun of running through cyborgs with a flechette rifle.