The infested factory builds quasi-mechanical infested terran units for Alexei Stukov. It is an infested version of the terran factory. It allows Stukov to construct infested siege tanks and infested diamondbacks. Unlike the terran factory, units are spawned based on charges, with the structure able to store five charges of a unit. The infested factory can construct the infested tech lab as an add-on, allowing for production of infested siege tanks as well as the purchase unit upgrades.