Welcome to Production Practice. A sci-fi corridor for a Horror game

Groups of terraforming-engineers are being sent from the crippling ruins of earth to the
current homeland, Mars. Mars has been run by a large number of earths higher individuals and have been living there for decades now.
The trip takes two years on the aging intergalactic transport ship with all employees being stored in cryogenic status. The engineers take turns to awake from cryogenic sleep in pairs for 2, months at a time. Making sure the shuttle is in working condition while making sure they're maintaining the correct course.
The protagonist awakes and notices that his co-workers are no longer in their cryogenic machines and his partner is no where to be found. As the protagonist investigates the surrounding areas he notices that not all is right and that something has effected the internal power system within the ship. Further within his investigation, he starts noticing that the ship has been effected from the inside
and his worse nightmare has come true.
An extra terrestrial being has entered the ship and must be the reason for all the other crew members' disappearance. The protagonist must find clues around the ship and try to figure out
what has gone on with the power system and what has become of his crew. Because of the problems
throughout the ship the protagonist has to explore around a dark and damp filled ship with only backup lights that shine eerily throughout the hallways.
Only the fittest will fight to survive almost certain death.