Part 15

Guide to completing the Hidden Agenda mission in Prey (2006), including how to get the Acid Sprayer and defeat hunters.

Walkthrough:

1. Move through the first area, avoiding eye stalks and activating the mounted security turret.
2. Enter the next room and use the alien hand on the panel to open the door.
3. In the left and right rooms, destroy the blue power source capsules. Be aware that destroying a capsule will activate eye stalks and lasers; avoid touching the lasers to prevent a mounted security turret from activating. Ammo containers are available in each room.
4. After destroying both blue capsules, return to the middle room and take the Acid Sprayer from the table between the two pillars.
5. Orange portals will open, and hunters will emerge. Use the Acid Sprayer, which is powerful at close range and can kill a hunter with one spray if aimed directly.
6. Once hunters stop spawning, an orange portal will open and remain open. Turn around, exit through the door behind you, kill any hunters, move around the wall, and use the touch screen monitor to turn off the forcefield.
7. Exit the room through the now-unblocked door.
8. In the next room, you will encounter hunters and a mounted security turret on the ceiling.
9. At the end of this room, a forcefield blocks your path. Step into the small alcove to the left of the forcefield, then enter spirit form.
10. Move around the circular walls until you reach another alcove with a touch screen monitor. Use this monitor to shift the alcove.
11. Remain in spirit form and move through the next forcefield.
12. Locate another touch screen monitor and use it to shift the alcove again.
13. Kill the hunters. At the end of this hall, crouch and move through a box to enter a new area.
14. Use the touch screen monitor to your left to turn on the screen and open an orange portal directly across from you.
15. Move around this area until you find another orange portal. Go through it.
16. In this room, you will encounter mutilated humans who will not attack unless provoked. Go to the area with the crate and monitor. To your right, crouch and pass through a hole in the wall.
17. In this room, you will encounter flying drones. Use the Acid Sprayer if you have ammo left.
18. Once the room is clear, enter spirit form and cross the visible bridge over the gap.
19. Use the touch screen monitor on this side of the room to disable the forcefield blocking the wallwalk.
20. Return to your body and follow the wallwalk to the middle section. Hop off, being careful of the security turret directly in front of you.
21. Crouch down, follow the path, and drop down the pipes into a room below.
22. Move to the end of this area and shoot the gravity panel on the wall next to you.
23. Move around the room until you find a hole in the floor blocked by a forcefield.
24. Stand on the forcefield, enter spirit form, shoot the gravity panel on the floor in front of the forcefield, and use the touch screen monitor to deactivate it.
25. Return to your body. Shoot the gravity panels in this room to align the forcefield