The Mound: Omen of Cthulhu Guide | How to Unlock the Mound

The red barrier at the Mound entrance cannot be opened simply by reaching the location. In The Mound: Omen of Cthulhu, you must first complete a chain of Fort's Logbook and Mysterious Artifact expeditions, recover five Tulu metal cylinders, and then launch the expedition that takes you inside.

Unlock the Mysterious Artifact Expeditions

Begin by completing the expedition that asks you to recover the Fort's Logbook for the relevant area. Returning the logbook unlocks a new set of expeditions called Mysterious Artifact. These contracts require you to bring a Tulu metal cylinder back to the Captain.

Recover All Five Tulu Metal Cylinders

There are five-cylinder contracts to complete. During each expedition, listen for the artifact's distinctive sound and look for green mist marking its position. The exact spawn can vary within the contract area, so use both cues while searching.

Picking up a cylinder immediately triggers a Blood Moon. Carry it back to the wagon and secure it on the rear storage area. Loading it onto the wagon ends that forced Blood Moon, allowing you to return to the extraction point with the artifact.

Activate the Five Statues

Each successfully returned cylinder lights one of the five statues beside the Mound entrance. The red barrier remains active until every statue has been illuminated, so finding the entrance early does not let you bypass the contract progression.

Start The Mound: Explore the Underworld

After returning all five cylinders, speak to the Captain and check the expedition list. The Mound: Explore the Underworld will now be available. Starting it transports you directly into the Mound instead of sending you through the red barrier from a normal expedition.

The wagon cannot accompany you into the Mound. Fill your inventory with healing supplies and any essential equipment before starting the expedition.

After recovering all five Tulu metal cylinders, select The Mound: Explore the Underworld to enter the Mound.

FAQ

Q. How many Tulu metal cylinders are required to unlock the Mound?

A. You must return five Tulu metal cylinders, with each one lighting a statue near the entrance.

Q. Why is the red barrier still blocking the Mound entrance?

A. Reaching the entrance is not enough. The barrier remains until you complete all five Mysterious Artifact cylinder contracts.