How do I get all the gadgets on batman archum asylum?

I am trying to find all the gadgets for batman archum asylum..Does anyone know where or how to get them I am on the part where I just finished rescuing the gaurds in te cages and I am stuck can't find the hidden door.How do I get all the gadgets on batman archum asylum?
Batman: Arkham AsylumHow do I get all the gadgets on batman archum asylum?
You'll get them throughout the storyline. The remote control batarang and the multiple batarang are Waynetech upgrades. However the others, like the Line Launcher or the Explosive Gel are all acquired when they are needed for the purposes of the story.

The hidden door is on a ledge, there's some metal panels on the wall. Use your detective mode to find Harleys fingerprints on which one you need. Batman will rip it off and there will be a security box for you to break with your sequencer. Doing that will open the hidden door

round table pizza menu

area code look up