Follow the Batman: Arkham City Harley Quinn's Revenge Bombs Locations guide in which it will show you how to unlock the bomb squad achievement and trophy in the game. Follow the complete guide below that will show you step by step on how to defuse all bombs in 3 minutes or less. If you are able to debuse the bombs on time you will acquire the Bomb Squad achievement and trophy. Need additional help with completing the DLC then take a look at the Batman: Arkham City Harley Quinn's Revenge DLC Walkthrough and Harley Quinns Balloons Locations
