Office Commando addon - Half-Life

(11 maps) You are Gordon Freeman. You have accepted work from the mysterious G-Man. You thought he was interested in giving you work as a special agent, to go on secret missions and save the world! Instead, he assigns you to an office, to work threw mounds of paperwork. After a few years of work, your office complex grows into a military base and scientific research facility. Great you think more government experiments. After weeks of no "accidents", you put your mind at rest and start getting a lot more sleep on company time. Until, one day everything goes awry (of course) and the Xen aliens return. With the military again trying to kill all people in the know, you must escape Yellow Desert Research Base.