The Mound Field GuideView on Steam
Explorers entering the cursed jungle in The Mound: Omen of Cthulhu

Independent launch guide ยท Updated July 18, 2026

The Mound:Omen of Cthulhu

A source-checked field briefing for the newly released co-op expedition from ACE Team and Nacon. Start with what is confirmed, then follow the official channels as the game changes.

Read the briefing Official Steam page
July 152026 release date
1-4Player expedition
25Steam achievements
PCVerified Steam platform

Field briefing 01

What is confirmed

This first edition stays inside the official record. It does not turn launch-week speculation into strategy.

01

A co-op expedition

Steam describes support for up to four players, with both online co-op and single-player listed.

02

A treasure hunt under pressure

Your group enters a cursed jungle in search of treasure while hostile creatures and altered reality threaten the expedition.

03

Built by ACE Team

The game is developed by ACE Team and published by Nacon. Steam classifies it as action and adventure.

04

Launch information is moving

Patch behavior, discoveries, and community routes can change quickly. Each future guide will identify its source and check date.

An expedition cart moving through the jungle

Release status

Live now, still changing

The Mound launched on July 15, 2026. This site is being built as the first reliable questions appear, so current official information takes priority over recycled pre-release claims.

Check current Steam activity

Field guides

Answer the first questions

Each page is built around one launch-week search question and stays inside a clearly stated official evidence boundary.

01

Release date

Confirmed launch date and official platform listings.

02

Crossplay status

What Xbox confirms, and what remains unconfirmed across all platforms.

03

How many players?

Single-player support and the maximum online expedition size.

04

How to play

A spoiler-light explanation of the official expedition and sanity loop.

Source ledger

Start from the record

These are the source boundaries for the launch briefing. Community discoveries will be labeled separately when guide pages are added.

Primary sourceOfficial Steam listingRelease date, supported modes, platform, genre, developer, publisher, and achievements.PublisherNacon game pageOfficial publisher description, media, and product positioning.Live signalSteam Community hubCurrent announcements, discussions, screenshots, and launch activity.