I'm trying to do the Worst Nightmare Dark Knight Challenges, and I am wondering about the one where you must do four exotic takedowns in one predator encounter. Hanging Ledge, Corner, Vent, and Explosive Gel Takedown. However, whenever I try to do the explosive gel one, they always just fall over stunned and never seem to die.
Am I missing something, or did it count if I just knocked them down?
When you spray the explosive gel on the brick wall, make sure the enemy is on the opposite side of it. It won't work if they're standing on the side that you sprayed the gel on, I was having a problem with getting rank 6 of the Worst Nightmare challenges done because I kept blowing my enemy up from the wrong side.
Then I did it on the opposite side they were standing and I got that challenge done, I'm probably going to have to restart the game though because I need to start doing the challenges from the beginning of the game because I picked up on them a little late. Hopefully it works for you, I thought my game was glitched but luckily it isn't.