Press RB to send an impulse and activate the engine for a short while.
Note that now you’re free to use the newly unblocked passage.
Repeat the same process after reaching the second locked door#1.
Approach the door and open it to get back to theAssembly Line.
Use theGrapnel Gun#2and get inside the ventilation shaft.
Head to the neighbouring room and note that 4 newenemieshave appeared here.
Carefully exit the shaft.
Stun the two first enemies with a surprise attack#2and afterwards take care of the two other Thugs.
Your objective is reaching the main room of theLoading Bay#1.
Head to its middle part and listen out to another conversation withHarley Quinn#2.
You will have to solve a puzzle to gain access into Joker’s office.
Approach the generator found in the middle part of the room#1and equip theRemote Electric Charge.
Choose the negative charge (RB)#2and note that it sets the big hook into motion.
It’s not the end, as now you have to pull out the door.
It should cause the hook to tear out the door, creating a passage for you.
Now you could approach the place where the door used to be and use theGrapnel Gun#1.
As the battle starts, focus on eliminating the “regular"enemiesfirst#1.
Remember about having to counterattack often, thanks to which you shouldn’t lose too much energy here.
At the same time give a shot to dodge Mister Hammer’s attacks#2.
Fight until you get rid of the normal Thugs and afterwards move your attention to Hammer.
Quickly approach the stunned Mister Hammer and start rhythmically pressing X to land some quick hits#2.
One such action should be enough to eliminate the boss#1.
After you’re done with him, you could attempt to reachJoker’soffice for the second time#2.
This time you will succeed and a cutscene will start.
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