Below is a walkthrough for the Level 30 side quest called What was Lost in Horizon Forbidden West. To obtain this quest, speak with Kotallo at the base after obtaining Faro’s Tomb main quest.
Go to the Meeting Place
Travel to the Campfire near the Ninmah Research Lab.
Call Kotallo at the Campfire
Interact with the campfire to have Kotallo meet you there.
Enter the Zenith Lab
Sneak past or defeat the machines as you head to the Ninmah Research Lab. Enter via the tunnel in the mountain.
Go to the Storage Room
Follow the objective to the storage room, defeating the machines along the way.
Search the Storage Room for an Access Point
Facing the console where you enter the code, it will be behind you on the left.
Examine the Console
Interact with the console.
Kill the Specters
Defeat the enemies that spawn.
Find the Components
Make your way up to the second floor and follow the objective until you come to a vent. Pull it down then head through the shaft. Head down the broken metal walkway then take a left through a hole in the wall. In this room, there will be a vent in the ceiling. Pull it down then head through it. Eventually, you’ll drop down into a storage room. Exit the room via the door to enter a room with an assembly line. Head to the east side of the room to find an Ancient Cache that you can pry open. Do so to retrieve the components.
Give the Components to Kotallo
Return to Kotallo to hand over the components.
Talk to Kotallo at the Base
Return to the Base and speak with Kotallo.
Go to the Meeting Place
Travel to a Campfire northwest of Stone Crest.
Call Kotallo at the Campfire
Interact with the campfire to call him.
Follow Kotallo
Follow behind him.
Talk to Kotallo
Speak with him.
Kill the Scorcher
Defeat the machine to complete the quest.
Rewards
- 9750 XP
- 3 Skill Points
- 1 Shellsnapper Circulator
- 2 Behemoth Force Leader
- 2 Ancient Sculpture