(10) Returning to the helipad Deus Ex: HR Guide
Last update: 11 May 2016
Regardless of whether Sandoval is alive or not, it would be good to take a look around his hideout for three Ebooks. Once you're done, choose the previously unexamined eastern door #1. Further explore the sewers, looking for a destructible wall (Punch Through Walls augmentation required) #2. There are a few items hidden behind the wall, the weapon upgrade being the most important of them.
Continue going through the sewers, eventually reaching a gate with a level 1 security electronic lock #1. Depending what you like more, you can either solve a hacking mini-game or input the code 0110. Note that you have reached the sewers below the Derelict Row. Head south, towards the sewers exit #2.
You don't need to worry about ending up inside the gang territory, as much has changed from your last visit and there aren't any enemies here now #1. Head towards the southern alley, going through a small tunnel #2 to leave the Derelict Row.
In accordance with the received instructions, you need to return to the helipad on top of the Chiron building, so head west #1. On a side note, I'd suggest paying a visit to the local merchants to get rid of unnecessary items and stocking up. also make sure that you've completed both side missions, as it won't be possible later on. Go inside the Chiron building and use the elevator in the lobby #2.
After reaching the upper floor, ignore the main hero's apartment and head to the eastern elevator #1, which you have been using in the previous phase of the game. Keep following the linear corridor, reaching the building's roof eventually. Wait for the helicopter to land #2, approach it and confirm the will to fly away. Malik will transport you to Sarif Industries head quarters, where you will start a new main mission - Cashing In Old Favors.
Reward: 750 EXP.