consists of unlimited waves of enemies, and the player is required to constantly bank their points to add to their time. It is one of the three DLC challenge maps that are not part of any character DLC, with the others being Iceberg Lounge VIP Room and Batcave.
- 100,000 points
- 500,000 points
- 1,000,000 points
This challenge features an unique timer system, starting from 2 and a half minutes, and can expanded by defeating enemies. On the right side of the screen, there is a new HUD item which shows the players current rank and points, and how much time banking said points would add. Every new rank reached spawns more difficult enemies.
- This is one of the three challenge maps in Batman: Arkham City in which The Riddler isn't providing the commentary, being replaced by The Joker. The other maps are Iceberg Lounge VIP Room, which features the Penguin, and Batcave, where the Batcomputer informs enemies.
- If the player manages to reach a 100x combo, Joker will jump into the arena, and become an enemy. He can be knocked out, and has around as much health as an Armored Henchman. Naturally, Joker's commentary will end upon joining the fight.
- If the player chooses to play as Robin, Joker might mention "Didn't I kill you already?" This is a reference to the second Robin, Jason Todd.
- A criminal sing the opening of 1966 tv show.