Origins/Major Influence: Little Lost Warbot (Paranoia Mission, published in White Dwarf Issue #91)
Description: This "complex", long ago, has been invaded and conquered by aliens. The infrastructure of this complex has decayed through non-maintenance, and most robots has long been deactivated. There are a few security checkpoints, which can only be bypassed only by barcodes on the left hands of humans. Most of the humans within the complex has since been exterminated, and the few remaining survivors (security guards, troopers, and technicians) been brainwashed with "implanted thought-control electrodes" that also function as a radio transmitter to allow the survivors to communicate with each other and the alien invaders. The only way to override the the electrodes is through Communist Propaganda.
The Computer speaks in a soft, feminine voice; still paranoid but nicer about it. It's also utterly powerless and seems completely unaware of the alien invasion.
The aliens learnt of Earth's existence by intercepting BBC's broadcasts and were immediately fascinated by 'popular culture'. They began initiating and copying whatever was on the BBC, even going so far as to encase their cute teddy-bear-like bodies in "Dalek" shells (...because that's how aliens were portrayed on the BBC). However, the aliens were repulsed by the human race and its disgusting forms, even while being attracted by their sophisticated culture.
Eventually, the aliens were convinced by a rabble-rouser named "The Leader" to invade Earth, saying that the conquest of Earth is something all civilized races would strive for. Once the aliens conquer and annihilate the fallible human race, then the aliens will be the sole owner, protector, and interpreter of 'popular culture'. The Leader led a squad of a mere 100 men and several "Sun Cannon"-equipped warbots...and easily conquered this 'complex'.
However, future expansion was hampered by internal traitors who hated The Leader's autocratic policies and would do anything to overthrow his dictatorial regime, even allying with the human race. These traitors want to find more information about 'The Doctor', a man that they believe hold the key to destroying The Leader and routing the alien invasion force. Alien Complex today fight a ruthless (and possibly perpetual) war against these traitors.
Until the day when the aliens succeed in conquering Earth, the aliens continue to discover and adopt brand new Earth customs, including that of security clearances and R&D field testing. They however do so in a filtered and corrupted manner, similar to the Romantics secret society. That may be the true horror of the aliens: the semi-accurate imitation of human behavior that hits a bit too close to home for the players.
Spy From Another Alpha Complex: The spy is a human that has been mind-controlled by the aliens to serve them and their two goals: global conquest and the documentation of 'popular culture'.