Act 4: Hive

Chapter 1: Priorities

Collectible 28: Locust Terminal

The Locust Terminal is in the same room where you have to activate a terminal to search for Maria. Do not activate the first terminal yet. Instead, check the second terminal to get this Collectible.

Chapter 2: Answers

Collectible 29: Locust Prisoner's Journal

Once the Mauler, Theron Guard, and Drones have left or been dealt with, before checking the terminal, look to the left of it near the cavern wall to find the Locust Prisoner's Journal.

Chapter 3: Hornet's Nest

Collectible 30: Locust Jailer Document

Just downstairs from where you enter, turn right, and go down the small corridor. You will find the Locust Jailer Document on the floor.

Collectible 31: Human Finger Necklace

This Collectible can be easy to miss. After you defeat the pair of Grinders that come out of the large doors, you will need to Roadie Run to enter the small room with the Troika before the door closes. If you do not get through the door in time, Roadie Run up the steps and across the room to get in the second door before it shuts. The Human Finger Necklace is behind the Troika.

Chapter 4: No Turning Back

Collectible 32: Locust Calendar

Go up the stairs just after you start the chapter. The Locust Calendar is the round thing with glowing orange lights on it, against the wall.

Collectible 33: Locust Defensive Plans

After pulling the lever to extend the bridge, run across it, and turn left. The Locust Defensive Plans are at the end of the hall.

Chapter 5: The Best-Laid Plans

Collectible 34: Locust Invasion Map

Before getting on the lift, go around the outside of the palace to find the Locust Invasion Map in a little alcove just past the lift.

Collectible 35: Trinity Of Worms

Before heading down the spiral staircase, climb the staircase on the right (where the Grinder was). This Collectible is a pattern on the floor at the end of the hallway, beyond the stairs.

Chapter 6: Royal Inquisition

Collectible 36: Locust Tablets

Near the beginning of the chapter, the Locust Tablets are on the floor between two pillars. They are to the left of the computer room, near the corner.