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

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

Arkham Asylum' Explores Batman's Angry Side

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

Batman: Arkham Asylum - IGN

Batman: Arkham City (PC, 2011) for sale online

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

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

Intro / Intensive Treatment - Batman: Arkham Asylum Guide - IGN

Batman: Arkham Asylum - IGN