Final Battle--Part 1

Go to the Party

See the fireworks? That's where you should be going! Head through the door leading to West Arkham, then speak with the bouncer by the Joker Head's entrance to gain access (they won't attack you so long as you leave them alone). Inside, you'll find the Joker.

Defeat Joker Before He Destroys Gotham

First up: Tackling a huge group of enemies, including two more roided up baddies. Like before, you should focus on evading the enemies using using rolls and focus on the two brutes. Wait for them to charge, toss a quick-Batarang during it, then attack them after they charge into a wall. After a few attacks, Batman will hop aboard, allowing you to steer him around. Focus on taking down the other Brute while you have the chance--rinse and repeat. Once you've taken down the two giants, the battle will end, regardless of how many inmates are left. The Joker's easier than he appears. Simply take down each group of thugs, then use the Ultra Batclaw on the Joker's back when he turns away, pulling him to the ground, allowing you to attack him. Repeat twice more to do him in for good. To take down the groups of baddies, it's best to roll over them and try to attack them in smaller groups. Also, be on the lookout for the chattering teeth bombs, as they'll explode when near; try to lure them into groups of enemies to deal some heavy damage.