You can now take the exit from the bar [East Tower - 25th Floor]. Turn left and spread the explosive gel over the weakened fragment of the wall. Then, detonate. Now, use the hook, to make it over to the East Tower Facade. After your character reaches the vantage point, locate the open window on the left and use the hook again to reach the East Tower - 28th Floor.
Use the shock gloves to raise the metal gate and walk into the area where Joker has planted a number of bombs. Select the Cryptographic Sequencer from the inventory, target the panel for the disarmament of the charges and start the hacking mini-game. As you can probably figure out, you will have to complete a mini-game of higher difficulty level and so, you need to select the correct password from among the available combinations (the screenshot).
The attempt to disarm the bombs will, unfortunately, be a failed one so, you need to hop quickly over the big window located on the right of the hacked panel. As a result, you will escape death by the exploding bombs [Exterior Facade]. Apart from that, be prepared to use the hook to catch the local news helicopter, which will transport Batman over to the large East Tower Terrace. Here, you will have to fight another series of battles but first, you will have to let go off the chopper.
Do not worry that the game is, at first, presenting the battle from the perspective of the cameraman onboard the helicopter. Soon, the situation will change and, as a result, you will not need to bother about this non-standard view. Just like many times before, first take on the martial artist and try to eliminate him as quickly as possible. Avoid taking unnecessary damage because there will be more enemies to come, apart from the ones already present in the battlefield.
Eliminate the successive, weaker enemies and keep in mind that the fights will soon be joined by new bandits. After you charge Batman's shock gloves use the fact that you are currently capable of landing heavier blows and take on the martial artist and the armored enemy. After you win the fights, use the hook onto the balcony above and go towards the door to the East Tower - 40th Floor. Follow the linear corridors into the East Tower - Swimming Pool, where there is another numerous group of enemies.
[New challenge: Campaign Challenge]
[New challenge: Custom Challenge]