The Mound: Omen of Cthulhu Full Release Guide

Quick Answer

This hub covers the current full release of The Mound: Omen of Cthulhu, updated July 22, 2026. Start with the Beginner Guide for the Tempestad, six inventory slots, shared equipment, and the first successful extraction. Use the Contracts Guide for objectives, quota, Logbooks, Saints, and artifacts; the Sanity Guide for hallucinations, revives, and forest pressure; and the Mound walkthrough when you are ready to enter Passage Into the Depths and unlock the five Tulu cylinder stage.

Choose the Right Guide

Pick the page that matches the problem stopping your current progression.

What Kind of Game Is The Mound?

The Mound: Omen of Cthulhu is a four-player co-op expedition game about Spanish explorers entering a hostile continent in search of treasure, missing crew, ancient documents, and the route into K’n-yan.

Every expedition begins on the Tempestad:

1. Choose a contract.
2. Divide its shared equipment.
3. Select a destination.
4. Enter the jungle with Father Escalona’s ox-wagon.
5. Complete the named objective.
6. Return enough required value.
7. Finish the expedition before the route collapses.

The combat is only one part of that loop.

The game also changes what individual players see and hear. A real teammate may appear hostile to one person while looking normal to everyone else. Blood rain or a reassuring horn can exist only for the affected player, and there is no visible sanity meter telling you when perception has become unreliable.

That combination of extraction, communication, and hidden hallucinations is the reason a good route needs more than strong weapons.

Full-Release Progression at a Glance

Progression expands significantly after the first successful return.

Start on the Tempestad

Most failed expeditions begin before anyone enters the jungle.

The Tempestad contains the systems that determine whether the route is prepared correctly:

• contract selection;
• the shared equipment pool;
• the destination map;
• Token purchases;
• weapon upgrades;
• Rank and Guidebook progression;
• Patron Saints;
• returned documents and crew.

I use the same order before every expedition:

Contract → destination → shared gear → optional preparation → boarding

The destination should be checked before buying equipment because it can add conditions the contract title does not reveal.

A Treasure Hunt may lead to:

• an unfamiliar region;
• night arrival;
• poor weather;
• a Lost Survivor;
• a route much closer to the Mound.

The Beginner Guide handles the complete first-hour preparation. The Hub only needs the core rule:

Do not take equipment until you know what the selected route is asking the team to do.

Six Inventory Slots and Shared Gear

You begin with six personal inventory slots.

Those slots must cover some combination of:

• a weapon;
• ammunition;
• armor or utility;
• food or Bandages;
• an objective item;
• treasure.

Rank rewards later increase inventory capacity, but the opening six-slot limit makes shared preparation important.

The strongest opening setup is not four independent builds. It is one expedition kit divided across the group:

• one player handles controlled close combat;
• one protects ranged ammunition;
• one carries navigation or recovery tools;
• one keeps enough space to move objectives and value into the wagon.

The complete four-job setup remains in the Beginner Guide so it is not repeated across every page.

Father Escalona’s Ox-Wagon Is the Route Anchor

The ox-wagon solves several problems at once:

• shared storage;
• objective protection;
• spare equipment;
• regrouping;
• route recovery;
• extraction organization.

I place progression items and strong treasure in the wagon before opening another route.

The most important storage distinction is:

• contract value helps complete the current haul;
• progression value can unlock destinations, crew, or story even when the object itself has little sell value.

A Fort Logbook is more important than its normal treasure value suggests. A high-tier Metal Idol can provide hundreds of value but does not replace a missing Logbook.

Contracts Are Objective Plus Quota

The named objective and the required haul are often separate.

A contract may ask you to:

• recover a Fort Logbook;
• rescue a Lost Survivor;
• complete a hunt;
• recover a special artifact;
• return a stated amount of value.

Finding the named object does not automatically mean the expedition is ready.

The safest check is Mission Information:

• objective missing and quota short: continue the primary route;
• objective complete and quota short: collect nearby reliable value;
• quota met and objective missing: stop general looting;
• objective and quota complete: begin extraction.

The Contracts Guide expands this into contract tiers, equipment pools, Boss fields, Metal Idol values, Saints, artifacts, and Token decisions.

Rank, Tokens, Saints, and Artifacts

The between-expedition systems support contracts rather than replacing them.

Rank

Successful contracts award XP toward a 30-rank progression path.

Early rewards include improvements such as:

• additional inventory capacity;
• new knife choices;
• stronger ally revives;
• weapon-handling bonuses;
• better resistance to expedition pressure.

Tokens

Tokens buy temporary equipment and weapon upgrades.

An expensive purchase is not automatically the best one. An Area Map can solve an unfamiliar Logbook route more effectively than another damage upgrade.

Patron Saints

Recovered Saint figures unlock blessings that can support:

• blades;
• polearms;
• bows;
• firearms;
• regeneration;
• healing;
• rain control;
• altered-state recovery;
• protection from a fatal hit.

Choose the Saint after checking the contract equipment, not before.

Artifacts

Artifacts have specific route uses:

• the Medallion points toward treasure;
• the Jar of Black Ichor draws creatures toward its landing point;
• the Mask of Nyarlathotep provides concealment but creates friendly-fire risk;
• the Area Map supports navigation;
• Ammonia Salts restore a fallen ally.

These decisions are covered together in the Contracts and Extraction Guide because their value depends on the selected contract.

Sanity Has No Visible Meter

There is no standard sanity bar telling you when to stop trusting your own screen.

Confirmed effects include:

• blood rain visible to only one player;
• a false horn call;
• altered teammate models;
• distorted voices;
• one-way proximity communication failure;
• a false Solo Bot;
• treasure or threats that teammates do not see.

The short Hub rule is:

When the team disagrees about what exists, stop moving deeper and verify a physical action.

The full identity-check process, mushroom limits, corruption, isolation, Centipedes, revives, bleeding, rain, durability, and forest awakening belong in the Sanity and Survival Guide.

When the Route Reaches the Mound

Returned Logbooks eventually open landing points closer to the Mound.

One confirmed destination, Wreck of The Lazarillo – East, appears two leagues away. From there, reusable landmarks lead toward familiar prologue terrain and the blue-lit entrance.

Inside Passage Into the Depths, the first visit reveals:

• an arcane barrier;
• five pillars;
• a new Guidebook entry;
• a journal found near the entrance;
• new work that must be completed from the Tempestad.

The most important route detail is not finding the chamber. It is returning successfully.

When my first entrance expedition failed during the return, the progression did not remain available. I had to reach the area again, secure the journal, and use Finish Expedition.

After the successful return:

• the document appears as Journal found at the mound – Note from Inés;
• most of the journal is attributed to Zamacona;
• Inés’ note introduces five cylinders made from Tulu metal;
• new contracts lead toward their jungle altars;
• the larger route continues toward K’n-yan.

Use the How to Reach the Mound walkthrough for the full approach, landmarks, entrance, journal, and return.

What This Guide Cluster Does Not Cover

This is a problem-solving guide cluster, not a complete database.

The current pages do not attempt to catalog:

• every weapon;
• every enemy;
• every treasure object;
• all 30 Rank rows;
• every contract equipment variant;
• every Patron Saint as a separate article;
• all cylinder altar locations;
• the complete K’n-yan route;
• every achievement condition.

Those topics should only become separate guides when they produce a real route, decision, or player obstacle that cannot be solved inside the current pages.

Recommended Route Through the Cluster

For a clean progression path:

1. Read the Beginner Guide before the first serious contract.
2. Use the Contracts and Extraction Guide once objectives, quota, Rank, Saints, and artifacts matter.
3. Open the Sanity and Survival Guide when perception, injuries, revives, or forest pressure begin breaking successful routes.
4. Follow How to Reach the Mound after deeper destination cards appear.

The Hub is enough when you only need to know where to go next. The four Spokes carry the actual routes, numbers, and troubleshooting.