Area 51 Guards are found in Area 51: Infiltration (armed with double MagSec 4s), Area 51: Rescue and Area 51: Escape. Armed with SuperDragons with underbarrel-mounted Grenade Launchers and Grenades they should be handled with extreme caution. They use a Falcon 2 as a secondary weapon should you disarm them.
They are a poor choice in combat simulator due to the face that their uniform is easily seen in almost every map, excluding Pipes and some spots in Ravine. Their original model also had a helmet which was never put into the single player, but can be found in Combat Simulator.