1 - RELAY HUB
Gadgets used: Cryptographic Sequencer + Cryptographic Sequencer Power Amplifier
Look around the roof for a control panel that you can hack #1 and use the Cryptographic Sequencer on it. Solve the mini game and crack the password #2. Note that therefore the locations of all 12 cameras in Park Row have been added t the map.
Gadgets used: Batarang
There is a total of twelve TYGER cams in Park Row 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.