Marathon 1994

You are far in the future on a colony ship deep in outer space. A security officer on the mission, you are the last hope for defending the ship as hostile and intelligent aliens prepare to destroy every living thing… Alien forces have boarded the colony ship UESC Marathon in the Tau Ceti system, in orbit around humanity’s first interstellar colony. The situation is dire, and as a security officer assigned to the Marathon, your duty is to defend the ship and its crew from the alien threat.