Labrunner

Out west in a secret underground government facility a mad scientist has taken control. He has either killed or captured all who worked inside. On numerous occasions the military has attempted rescue operations, all of them ending in casualties. These soldiers are welcome to the crazy scientist controlling this facility, as they provide a constant stream of test subjects.

You were a simple janitor cleaning the halls one day when a strange flying contraption pricked you in the neck. After falling unconscious, you woke up in a barren cell and have been there ever since. For the past few days you've felt the rumble of explosions and heard the roars of monsters through walls of your cell, usually proceeding a jolt of movement, similar to a descending elevator. 

Soon you will be the latest test subject for the facility's new self appointed CEO.