Skinner Co. Factory - Batman: Arkham Unhinged

A meat packing and distribution plant based in Gotham City, the Skinner Co. Factory was the base of operations for Roman Sionis, aka Black Mask and his criminal empire. 

Making use of the space and resources, factory workers under Sionis' employ smuggled everything from weapons to drugs out of the facility. They also used the walk-in freezers and meat hooks to dispose of the corpses of their enemies, or those who displeased Black Mask himself. 

It was the sight of an ambush between Black Mask's goons and Tyger Guards, who, on the orders of Professor Hugo Strange, were tasked with capturing Sionis and Sionis alone. Seeing everyone else as disposable, Tyger made quick work of the foreman and his employees, gunning them down with no mercy. 

Having memorised the building's layout when he first moved in, Sionis initially managed to out maneuver the sting operation, only to be met by a second platoon.