This is the fifth part of our latest walkthrough, Batman: Arkham Knight, fully patched on the PC. Trust me, the title of this one's earned its name. There are quite a few glitches in the game here from Joker's clothing to a Gordon that apparently doesn't know how to work an elevator.
Anyway, this part covers a flashback segment featuring Gordon learning about "mad clown disease," some of Batman's best encounters with Joker, his argument with Gordon, and the first mission of the Campaign for Disarmament side mission.