City of Death

Synopsis
''The typhoon pours down as the triad soldiers fan out in front of you, leading the way into Kowloon Walled City. Raymond shuffles along, alert and intent. Although exhausted by all that has gone on, he drives himself forward, and will not accept help from anyone. Wu watches the windows and rooftops, his rifle never leaving his shoulder. He occasionally risks a glance at his foster-father, concern, frustration, and anger playing over his face like a slideshow.''

''The Walled City is worse than in your first visit. Even with the rain, you can feel something in the air. It's thicker now and it clings to your skin like invisible filth. The miserable noises of slum life are gone, replaced by something worse. The sounds of death. The sounds of fear.''

As you round a corner, the group stops before heading in deeper.

Outer Ring

 * Fight through a group of four triads, not too hard don't worry.
 * If you chose to keep Ku Feng alive, she will appear before you (she kills a guard) right at the entrance of the next area. You can choose to have her fight by your side or cover the area to prevent Tsang security from outflanking you.
 * If you have Gaichu in your party as well, you will earn the Monster Squad achievement when Ku Feng joins.
 * On the wall is the turret control. With 6 Drone Control, you can take control of the turrets, while with 6 decking you can disable them.

Mid Ring
Going through barricade to second transition...
 * In the room on the left of the entrance there is a ranged servitor. You'll get 1 Karma by killing it.
 * In the room on the right, Tsang security is freaking out. If you have 6 quickness, you can attack preemptively. After you take them out, pick up the explosive detonator.
 * After you pass through the door, there is a confrontation between Tsang guards and civilians in the room to the right of the transition. With high enough biotech, you can examine the civilians to learn that their behavior is a mix of mass hysteria and low-level brain damage - creepy, but not actually useful.
 * If you demolish the barricade, you'll have to fight your way through and you'll get to a different entrance to the Center Ring of the Walled City, but it doesn't change anything so its better to avoid losing time and health.
 * You will witness an altercation between Tsang guards. Take them out as they fight among themselves.
 * As you move forward you'll see that the guards are also fighting servitors.
 * Kill everyone/everything and head on through the next transition.

City Center

 * If she had joined your party, Ku Feng departs here, having changed her mind about wanting to fight a Yama King. She is content with allowing Qian Ya to reign in the Walled City as long as she has Repulse Bay to herself.
 * There is an injured person on the floor that you can interact with. Interacting with them consumes a DocWagon Trauma Kit from your inventory (any quality, taking the leftmost one), but this doesn't seem to do anything other than removing the interact icon from the body.
 * There is a distressed local you can talk to, who says more of the crazed babbling that has taken hold of the Walled City denizens. Then, continue onwards to the heart.