You are Gus,
A Construction worker working for a Federal Research Facility called Black Mesa. A week ago you just recieved a new Hazardous construction suit and helmet, it was developed by the science team here and seems to work great. The suit should come in handy for You really don't know a thing about the facility or what dangers, tests and experiments are being conducted here. All you know is your Job and thats what you were hired for. It's strange, you think but you try not to think about whats going on here. You have been working for about 4 years now, and have never seen anything like the events that will un-fold before your eyes.
You have extremely low security clearance to the facility, and the only thing your allowed to work is a forklift...
One things for certain, You are a human, and want to survive, kill or be killed.. by the aliens or the Urban Combat Troops.
And dying is not on Gus's to do list..