The Lower Corridor

Batman: Arkham Asylum Guide - Walkthrough

The Lower Corridor

After you exit the elevator you get a long CS that hints that gas is on the other side of that glass, and Big J continues to taunt you a bit, and when you finally get control back you find your way is blocked by big iron bars... Or is it?  A quick flick of Detective Mode reveals a nearby weakened wall, which you go ahead and blow.

Follow that path and you will eventually come to some teeth to kill and see the Commissioner in distress – he yells for help and gets dragged off, and now you need to rip that grate off of the wall and head through another duct.  When you get to the end it looks like the Commissioner is almost within your grasp – you just need to kick that grate out and rescue him, right? 

Unfortunately when you reach the Commish he is dead – or is he?  When you try to use your phone to call his daughter you get some unexpected results, and continuing on to the morgue you find a very interesting unreality – it has to be gas, right? 

You see the bodies of your parents, banging doors, and eventually, you end up in a twilight zone meets Escher environment wherein a very large Scarecrow is scanning for you!