Deus Ex: Human Revolution Walkthrough Part 17 – Locating the GPL
You have free reign over Hengsha. There are two side quest that will become available: Talion A.D. From Doctor Wing in the LIMB Clinic and “A Matter Of Discretion” when you receive a communication from Hugh Darrows.
While you are in Hengsha be sure to visit the LIMB Clinic for the Praxis Kits only. You are granted a secondary option to get a new biochip but it makes an upcoming fight many times harder. As for the reason, just remember your recent “landing” in Hengsha. Hold off for now and you will know when you can get away with it.
Complete what you want to then follow the marker to the Harvester Sewers. Here is where the approach will vary.
Roof Entrance (Stealth):
Requires the Icarus Landing System
Use the ladder just Northeast of the Harvester's Hideout and head up. From there make your way to the rooftops. Now go forward then to the left. You will find a vent opposite the entrance to the Harvester's Hideout. Use this to get into the Air Ducts in and into the Hideout. You emerge into an elevator shaft from the vent. You must fall the length of the shaft then climb back up one level. Exit the elevator shaft to the right to encounter two Harvesters talking. Careful work (or the Reflex Booster Augmentation) can easily take them down. Feel free to search the immediate area after you take them down for items. After that head back to the east and take cover behind the barrier there. Look ahead to spot the patrolling Harvester. He heads towards a camera and a pair of fellow Harvesters. Wait until he is heading back to the right, than take him down quietly at a distance. Aim for the body, you want the delay on the drug taking effect. This gets the guard to drop by the truck, out of sight from the guards and the camera. Head north now and down the nearby ramp. Head toward the junked car ahead of you and favor the right. There are two Harvesters at the bottom of the ramp. Deal with the one closest to you with a quick ranged shot. The one in the chair is asleep leaving only the patrolling one. Be on point so you will be able to take him out at a distance quickly. Otherwise simply wait for him to return to the area. Now move in, hugging the wall, and take down the sleeping Harvester.
Now head west and to the second car there for your cover. Look over to the car to spot your next target. Take him down with a quick shot. There is another sleeping harvester nearby. Before you deal with him you need to wait for a patrolling Heavy to start away. Move forward and take cover then look to the south. You will spot a Harvester in a window, you are too far away from him to spot you so take him out and duck back into cover. Now wait for the Heavy to come back then take him down once he turns his back.
Continue south to the next door and head through it. There are two Harvesters ahead in the bunk area with their backs to you. You can take them out for extra experience or simply go on ahead to find the Harvester's Leader. Head out to the east after that into the sewers.
Front Door (Combat):
Enter into the alley just behind the downtown apartment. At the southern end of the alley is a ladder. Take it up a level up but do not take the second ladder up just yet. Now move onto the nearby sheet metal to the north. Equip your weapons of choice for larger groups. Look to the north to spot a harvester and gun him down to attract his nearby fellows. Get at them with a number of shots or a grenade. Now drop to the ground and move south a bit to find an alcove. Use this as cover to deal with the remaining harvesters in the area. Now head forward to the left and hack through the level 1 security door. Head down the corridor and you have a few choices. You can either hack through the door, level 4, or, as it is glass, you can easily use some explosives or your gun. Keep going down the stairs beyond the door. There is another hackable glass door and this one is only level 3. Beyond that door is another fight. There is plenty of cover in this room making it easy for you take care of the Harvesters in this area that lay beyond the next wall. Now move forward to the next barrier. From there take out the last Heavy in the area. Now there are two more Harvesters in the area which like to stay beyond where you can get to easily. You can either advance and take them out from there or wait for them to calm a minute then kill them.
Head to the corner and lean out to spot another pair of guards. Take them out then turn around and head through the doorway behind you. Head over to wall in the southwest. You can punch through it and take out a Harvester. From here you can easily pick off the remaining three Harvesters. Now forward, low to the ground, and use the wrecked car as cover. Lean out over a side to get a view into the room ahead. You can spot the three Harvesters inside the room easily. Pick them off one by one then head in. You will meet the Harvester's Leader there. From there you can head to the far side of the room and exit into the sewers.