[News: Gotham]
The riot is no small thing, and it comes complete with explosions and maximum firepower. TYGER guards are immediately dispatched to the scene, only to learn that they are outgunned by Edward Nigma's impressively armed prison gang. Multiple prisoners try to escape during the chaos. The first three are gunned down before they manage to get beyond the wall, and two more are dragged back into the prison with severe injuries.
When Nigma's fellow JLA-inmates make a run for it, TYGER guards pursue. Harley Quinn and Red Hood are followed into the tunnels below the prison. Only one injured guard returns, after making his way back to the surface once the pair is lost in Wonder City, and he indicates that he believes both Quinn and Hood are injured and hiding somewhere within the underground city. Catwoman, who attempts to escape after Quinn and Hood enter the underground tunnels, is shot down during her attempt. She is detained and taken to the medical unit for treatment, where medical staff is later found trussed up, and where medical unit guards report severe injuries. Catwoman is nowhere to be found.
Edward Nigma, the man responsible for the riot, is credited with the escape of his fellow rogues. Once his prison gang is decimated, he is taken to the cells below Arkham City's courthouse, where dangerous prisoners are held, and he is locked away under heavy guard.]