Batman: Arkham Origins Blackgate - Deluxe Edition

This achievement is story-related and unmissable.

When you first start out, DO NOT run after the Joker; he’ll just run away from you. Instead, Line Launch towards him to score a hit. Have it equipped already and you can just for a quick-action launch.

After the kick to the chest, Joker will pull out a gun. He’ll fire at you three times - jump at the last second when his red reticle shrinks. When he starts to load (listen for the sound), Line Launch towards him again. This will happen twice.

As a backup plan, the Joker pulls out an electric baton. Equip your Shock Batarang (), aim and hit the baton; the Joker will run away. When he stops to recharge the baton, Line Launch towards him. This will happen a couple of times.

After the Joker gets knocked around some more, he’ll put on a gas mask and flood the room with Joker gas as this part is a timed section. The Joker will mix shooting and electric baton rush attacks all the while his thugs will drop grenades. Time your Line Launches perfectly as your health will start to deplete.

Note: If you don't move for a few seconds, the Joker Thugs will throw down grenades.

After defeating the Joker, your reward will be Crypto Key Gamma.