The Joker's Party - Batman: Arkham Asylum Guide - IGN

The Joker now invites you to his "party" at the Penitentiary. This is the final battle, so feel free to explore for Riddles now -- or you can do so

Batman: Arkham Asylum - ps3 - Walkthrough and Guide - Page 67

The Joker's Party - Batman: Arkham Asylum Guide - IGN

The Joker's Party - Batman: Arkham Asylum Guide - IGN

Batman: Arkham Asylum Video Guide-Walkthrough - BAA - More Joker

Batman: Arkham Asylum (Game) - Giant Bomb

Batman: Arkham Origins - Wikipedia

Batman: Arkham City - IGN Walkthrough - To Joker's Lair

The Joker's Party - Batman: Arkham Asylum Guide - IGN

Batman: Arkham Origins has no plans to fix several game breaking