You have just awoken in an abandoned laboratory. Who you are, how you got here, and why are you here all seem to be a mystery to you. Yet there is a more pressing matter at hand, is that it is obvious you are not alone.
If you want to survive this encounter, and perhaps get out of this place, you must quickly adapt. Your priority in this battle is to keep the facility operational. To do this you'll need to use whatever you can find, be it a flashlight to illuminate the way or concussion grenade scare off any unsavory entities. Despite these grim circumstances there are still clues which may aid your memory, and there is a slight chance you may escape alive.
Enough talk, time is running out! Your fate is in your own hands and it's now a battle of will!