Marathon
You are far in the future on a colony ship deep in space. As a security officer, you are the last hope to defend the ship, because hostile and intelligent aliens are preparing to destroy everything alive...
Story
Alien forces have boarded the colony ship UESC Marathon in the Tau Ceti system, which is in orbit around humanity's first interstellar colony. The situation is serious, and as a security officer on the Marathon, it's your job to protect the ship and its crew from the alien threat.