8) Killer Croc's Lair/Cyrus Pinkney's Institute for Natural History
"Tick tock, feed the Croc!!"
- Killer Croc
After Batman defeats Poison Ivy, she reveals that the only place he can find the antidote to the Titan formula is in the sewers beneath the Asylum. When Batman heads down there, he finds Scarecrow threatening to dump his fear gas into the water, but Croc, thinking he was a lone guard, seizes Scarecrow and drags him into the water.
Batman follows him down into the sewers and lays a trap at the entrance. You then have to navigate a series of floating platforms to the various plants containing the antidotes, but you have to move slowly, otherwise Croc will instantly pull you under the water (resulting in a Game Over). He will periodically surface to chase you, destroying part of the pathway in the progress, forcing you to activate his shock collar with a quick Batarang toss and then usually requiring you to choose a different path.
Once you've collected all of the antidote, you are chased back to the entrance where Batman activates the trap and Croc is plummeted down to the waters below.
Thinking that was going to be the most nerve-wracking experience the Arkham series would offer, I boldly burst into the museum to rescue Mr. Freeze in City. Three words: "That freakin' Shark."
"Sorry Batman. Did I forget to mention my little friend down there?"
The one time we forgot our shark repellent spray...