(Missable) This trophy will be the biggest pain in this DLC. There are three bombs to diffuse. Each has a code that you have to decipher and then push to finally defuse the bomb. The one break that you get here is that the timer starts after you defuse the first bomb. The bad news is that on the way, you’ll encounter some thugs to beat up. You will have five minutes to get the bombs.
If you fail, either select Restart Checkpoint or let the timer run out to restart and go back to just after you defused the second bomb. You’ll be given four minutes (two for the trophy) to disarm the last bomb.
Bomb #1 (Deadbat) – In the room where Robin rescues Batman.
Bomb #2 (Murderer) – At the very top of the next large room, opposite the sniper.
Bomb #3 (JokerForever) – After you fight another set of thugs, you’ll be in a large room with some machinery above it. Climb up to it and use the Remote Electrical Charge with to charge it up and get it to a wall that can be blown up.