In this game, some short fat guy decides to prove that the police as well as Batman are incapable of doing their jobs. So he steals Batman's outfit, some of his toys, and brings along with himself advanced military weapon prototypes to wipe out the Joker once and for all 'till the next game, and save Gotham city.
This run starts off with walking by enemies, showing how incompetent criminals are at firing guns. It proceeds to aerial combat a bit reminiscent of Gradius, further demonstrating that even when criminals fire, their weapons are no match for Batman's Batwing, even when piloted by a Batman impostor. The big finale here shows that as evil as the Joker is, he like all others cannot withstand rocket grenades indefinitely.