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Guides

How to Find the Cultist Treasure in Once Human: Lost in Madness Walkthrough

Find the Cultist Treasure in Once Human: light the red candle at Coastside Plaza, take the Chalk Peak map, then dig up the treasure at Believer Colony.

By David Ware Updated October 16, 2026 2 min read
Image: Starry Studio

The Cultist Treasure in Once Human comes from Lost in Madness, a level 7 world task in Dayton Wetlands. Light the red candle in the supermarket at Coastside Plaza, open the crate that appears to get a treasure map, then follow the map to Believer Colony in Chalk Peak, at coordinates 2228, -4922. The catch: Believer Colony has level 35 enemies, so come back when you're strong enough.

Lost in Madness at a glance

Task typeWorld Task, Dayton Wetlands
Level7 to start
StartCoastside Plaza supermarket (7627, -4789)
TreasureBeliever Colony, Chalk Peak (2228, -4922)
Enemies at the treasureLevel 35
RewardsCurrency, 84 Asterism, 105 Battle Pass EXP, Eclipse Cortex Lv. 1

How do you start Lost in Madness?

  1. Go to Coastside Plaza in Dayton Wetlands and enter the supermarket, where a strange ritual has taken place.
  2. Clear out any enemies inside.
  3. Find the unlit red candle on the floor and light it.
  4. A crate appears. Open it to get the Treasure Map of the Chalk Peak.

Where is the Cultist Treasure?

The map points to Believer Colony, a settlement in Chalk Peak at about 2266, -4936. The treasure itself is at 2228, -4922, just off the center of the colony. Check your map's coordinates to pin it down.

How hard is Believer Colony?

Its enemies are around level 35, much higher than the level 7 start of the task. Level up and upgrade your gear first, and bring a friend if you can. There's no Rift Anchor in Believer Colony, so you can't fast travel straight there.

What else is in Believer Colony?

While you're there, look for six Storage Crates and four lore pieces: "I'm Sorry", "Prayer", "The Commandment" and "Unfamiliar Homeland". You can also loot Detoxident, Gunpowder, Iridium Crystal and Metallic Fiber, and gather Coneflower, Orange, Saffron and Sage plus aluminium, copper and tin ore.

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Image: Starry Studio

What do you get for Lost in Madness?

Finishing the task gives you currency, 84 Asterism, 105 Battle Pass EXP and an Eclipse Cortex Lv. 1.

Is Once Human still free to play?

Yes. Once Human is free on PC, mobile, PS5 and Xbox Series X|S, with crossplay. Its newest scenario, Isles of Abyss, launches on October 21, 2026.

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Image: Starry Studio

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David Ware
Written by

David Ware

Managing Editor

976 articlesWriting for iGame since 2024

David Ware is the Founder and Managing Editor of iGame Magazine. Since 2024 he has built igamemag.com into a trusted online destination for gamers and tech enthusiasts, covering the latest gaming news, in-depth game reviews, hardware and tech breakdowns, and practical guides.

How we write: every article is researched from official sources, such as developer posts, store pages and press releases, then fact-checked and edited by David Ware before it's published. We use AI tools to help with research and drafting.

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