Batman: Arkham Asylum
From SDA Knowledge Base
I found a couple of things on the Xbox 360 version (I have no knowledge about the PS3 or PC versions) so I just wanted to make a quick page about it in here. Feel free to edit it as you see fit (I probably mixed up the names of some things, mainly buildings).
Sequence skips
When you need to protect your Batmobile, you need to fight a couple of enemies and then open the trunk and get the Explosive Gel. After you retrieved the item, you need to go into Detective Mode and scan the area for a clue. It's not necessary to scan the area for a clue, you can immediately go to the Medical Treatment building.
After you've visited Poison Ivy the first time in the Botanical Garden, you actually need to go to the Arkham Mansion and talk to Cash. This isn't needed. When you get out of the Botanical Garden you can immediately go to the area with Arkhams' front gate and use the Grappling Line to enter the building from the top (You'll see 3 Jabbermouth's there). Normally when you would've talked with Cash there's a red guy up there (You know, those guys you need to stun first), but if you don't visit Cash the red guy isn't there.
Possible sequence break
Unfortunately I can't record from a console so I'll have to describe it... In the area with Arkhams' front gate, I tried to jump from the roof on the left of the building onto the place with spikes on the edges to enter the building from the top. You can walk a little bit next to the chimney there but there's a little invisible wall blocking you from getting more onto the roof. In some way I got Batman to jump kind of around the invisible wall onto the roof part, and from there I could jump on the higher place to enter the building. I did this after I visited the Batmobile so the trick was done early in the game. Perhaps when you try to do this trick later on, the triggers inside the building (To go to Croc's Lair) could already be present (Depends if the programmers were lazy of course ;)). Problem is, the trick is extremely tricky. I did it once by accident, and I haven't been able to reproduce it ever since.
