Ubistvo (stilt housing)

Chapter: J4 · Lanshiang: the Bike, Poisawan, the Shopping District, the Crash Site and the Stilt Houses
Chapter: A3 · Lanshiang: the Night Market, the Ubistvo, the Bus, the Train and the Stilt Houses
Where: 4-6 Stilt Housing Area (Jake) / 3-4 (Ada): the long roof, the boat and the downed helicopter's rotor. **Story Intersection**: Ada covers from range.

Weak point

The same: the base of the chainsaw

Three rounds back to back. On the roof it has more health and J'avo drop in non-stop until it goes down; here its wild swing is a QTE (mash while your partner helps) instead of putting you straight into Dying. On the boat it has less health. Ada decides the finale.

Reward

Ada's medal Saved Sherry from the attacking B.O.W. In Ada Chapter 3 the chapter ends when you board the jet ski (achievement This Takes Me Back).

In Ada Chapter 3, Killed more enemies than Jake and Sherry (2): outscore them during this intersection.

Step by step

Roof (Jake and Sherry): Flash Grenades, Remote Bombs and Bear Commander explosive rounds. Let its blind swings kill the J'avo.
Ada: from cover, the sniper rifle (the boxes only spawn rifle ammo). Shoot the J'avo in Jake and Sherry's way and focus the Ubistvo when it attacks them at the red building.
Boat (Jake): a tiny arena. About 2 Remote Bombs do it (leave room to get clear of the blast). Use the steering column to block its path.
Ada: at the crane, shoot it and, after a short scene, press the action button to drop the girders on it.
Finale: Sherry is trapped on the drifting boat. Jake shoots it from the pier; Ada does nothing until the prompt appears, then ziplines down and grabs Sherry. The rotor shreds it.