Old Chemical Weapons Factory is a large underground base that appears to have originally been a military chemical weapons facility. Numerous missile silos surround the base's two entrances that have been left open. Deep within, there are 5 control panels that appear to have been tampered with. The result is that a corrosive gas has been released throughout the facility. Ravens' Nest sends The Raven to enter and destroy all of the control panels to eliminate the gas' potential threat. Old Chemical Weapons Factory is an area of combat in the mission Stop Gas Exposure.