4J. Part Ten - The Underdwellers =

Control Room Access: Simply walk through. Collect the INTERVIEW TAPE on a crate in this room.

Croc's Lair: Line launch across the sewer to the lair entrance. Inside, crouch walk on wooden platforms to avoid making noise. If Killer Croc surfaces, throw a Batarang at his collar to stun him. Follow your scanner to find five plants for the antidote. Use a Batarang on each plant and press X to collect the spore. After the first plant, Croc will smash platforms, requiring you to run. Resume crawling once this stops. After collecting all five spores, backtrack to the entrance. Use the Line Launcher to cross any broken gaps. Croc will chase you; run and follow the camera cues for left turns. At the entrance, a gate will fall. Detonate the set gel charge as Croc charges to defeat him. Use the Line Launcher to reach the west door. Collect three JOKER TEETH before exiting.

Old Sewer: Defeat one armed and five unarmed guards, including one with knives. Prevent them from picking up dropped weapons. Head back into the vent to the Batcave. Collect the RIDDLER TROPHY at the far south point by using the Line Launcher.

The Batcave: Go to the computer to equip the ULTRA BATCLAW. Use it on weak walls or ceilings. Try it on the nearby east wall. Climb out to the surface and float across to the far rocks. Collect the RIDDLER TROPHY on the bottom ledge of the large rock. Line launch to the next rock and enter. Use grapple points to ascend. Collect the RIDDLER TROPHY accessible from a grapple point leading outside; float down to it from the northeast. Return by line launching and grappling up. From the top of the rock, line launch north and head through the tunnel back to the rock bridge leading to the Old Sewer. You can still use the drop point from Arkham North if needed.

Old Sewer (Return): Collect the RIDDLER TROPHY above you by using the Ultra Batclaw on the weak ceiling. Head north.

Main Sewer Junction: Climb up. Note another blocked exit. Collect the RIDDLER TROPHY by hopping south across flowing water and line launching east. Collect another RIDDLER TROPHY from the older exit by line launching across. Line launch west from this exit, climb the north platform, and reach the highest point on the ruined wall to the south. Line launch north and climb to the top. Collect the RIDDLER TROPHY in the northeast corner, near the Pump Control Room, by dropping down or line launching. Use the Ultra Batclaw on the weak wall and grapple up. Perform a Ledge Takedown on any guards.

Pump Control Room: Defeat four unarmed guards and head north. Collect the SECRETS MAP on the desk and the INTERVIEW TAPE near the exit.

Pressure Control Junction: Defeat one armed and one unarmed guard. Head east first. Collect three JOKER TEETH in the east passage and three in the west passage. In the west passage, use the Ultra Batclaw on the weak wall.

Control Room: This is a predator room with seven guards. Utilize gargoyles, floor vents, weak walls, and ceilings. Two guards are in the control room with a weak floor. Hack the Joker box on the wall. As you leave, face two more goons, one with knives. Collect the CHRONICLE OF ARKHAM by pulling down the south weak wall. Collect the RIDDLER TROPHY by pulling down the west weak wall.