Island Surface--Part 1

Protect the Batmobile

After exiting, you'll receive a call informing you that you need to protect the batmobile, which will be marked on your map. To get there, run down to the statue ahead and turn right, following the dirt path up to the door on ground-level (and not the one up the stairs).

Once through, you'll spot an ambulance, with several armed guards waiting just on the other side. You'll want to avoid drawing their fire by grappling up to the ledge above them (try targeting it from the left side of the ambulance) and then dropping off the other side, behind them, for a couple of stealth takedowns, then proceed through the door.

Back outside, you'll spot the batmobile just ahead, surrounded by some unruly inmates. Try grappling to the building just before them, on the right, allowing you to Glide Kick at least one of them in the face. Now make sure to disarm the enemies armed with melee weapons (by countering their attacks) before taking them down. After killing the group, approach the Batmobile and interact with it to obtain the Explosive Gel. This item allows you to plant and detonate charges to destroy weak walls or floors, creating entrances into otherwise inaccessible areas.