1 - RELAY HUB
Gadgets used: Cryptographic Sequencer + Cryptographic Sequencer Power Amplifier
Use any method you like to reach the very top of the tower #1. After getting there find a control panel that you can hack #2 and use the Cryptographic Sequencer on it.
Approach the mini-game and hack the password #1. Note that therefore the locations of all 12 cameras in Industrial District have been added to the map #2.
Gadgets used: Batarang
There is a total of twelve TYGER cams in the Industrial District and destroying them will let you complete a total of four riddles (three cameras per each). Each time you find a camera (K on the attached map), prepare an ordinary Batarang and throw at it.