Reading for the bored:
Deep beneath the surface this obsolescent facility is kept running despite the recent press release telling the world that it had been buried for good. The toxic air and stories of alien infestations are enough to keep anyone out but the need for pay still forces the unlucky few to work here. Soon after the re-commissioning of the waste processing facilities in zone 067 the alien hordes broke through from the caverns below. They had overrun the area before anybody could react, they came through the sewers, the ventilation system, any way they could find. The workers tried to escape but all access routes were sealed to contain the infestation, though the rumor mill insists that it was more to silence the workers. It's not hard to believe - there are so many tunnels and passages to zone 067 that sealing the access doors wouldn't even inconvenience the alien's progress. The PR department wouldn't allow anyone to tell the world that the alien threat still exists. If you mercenaries succeed in clearing the infestation, will you be allowed to leave alive?