When Is The Mound: Omen of Cthulhu Release Date and How Does Co-op Work?

Brace yourselves for a journey into absolute madness. Publisher Nacon and Chilean developer ACE Team, the inventive studio behind acclaimed surreal titles like Zeno Clash, have officially released their tactical co-op survival horror game, The Mound: Omen of Cthulhu. The game launched on July 15, 2026, for PlayStation 5, Xbox Series X/S, and PC via Steam and the Epic Games Store. Set during the historical Age of the Conquistadors, this intense first-person title challenges squads to explore a cursed South American jungle, gather riches, and escape before cosmic insanity takes over completely.

The Mound: Omen of Cthulhu Key Information

• Developer: ACE Team
• Publisher: Nacon
• Genre: Co-op Tactical Extraction Shooter, Survival Horror
• Platforms: PC, PlayStation 5, Xbox Series X/S
• Release Date: July 15, 2026
• Official Website: Nacon Corporate Portal
• Official Social Media: ACE Team Official X Profile

What Is the Gameplay Loop in The Mound: Omen of Cthulhu?

The game is built from the ground up as a purely cooperative, high-stakes extraction experience. Up to four players start each run on the deck of a massive Spanish galleon, where a mysterious commander known as El Capitan issues high-reward expedition contracts. These contracts demand that your team venture into a dense, uncharted jungle to collect ancient treasure, find missing personnel, or locate lost fortresses.

Survival depends heavily on speed, stealth, and resource management. Because inventory space is incredibly limited at the start, you cannot simply hoard everything you find. Instead, squads must drop their spoils into a slow-moving, oxen-driven cart that leaves a trail of salt to mark an extraction path. Furthermore, your period-accurate weapons, which include fragile crossbows, bows, and early firearms like the arquebus, possess limited ammunition. This mechanical limitation forces groups to prioritize stealth, tactical defense, and evasion over aggressive gunplay.

How Does the Co-op Madness System Work?

The real antagonist in this Lovecraftian nightmare is not just the physical monsters lurking in the brush, but your own mind. Inspired directly by H.P. Lovecraft’s short story The Mound, the game implements a unique psychological madness system that completely lacks user interface elements or HUD warning sirens. As your character’s sanity deteriorates, the game quietly gaslights your senses, forcing your brain to process terrifying illusions as objective facts.

This altered perception triggers absolute chaos within a team through several distinct hallucinations:

• Visual Terrors: A healthy teammate might suddenly look like a horrifying cosmic monstrosity to a panicked player, leading to tragic friendly-fire incidents.
• Environmental Distortions: Safe paths might look like bottomless pits, bushes will appear to crawl with life, and a localized rain of blood might fall exclusively on a single player.
• Auditory Gaslighting: Your brain will fabricate distant horn signals or calls for help, tricking you into separating from your squad and walking directly into a deadly ambush.

Because of this constant mental manipulation, proximity voice chat becomes your ultimate tool for survival. Teammates must constantly communicate to serve as each other’s reality checks, validating whether a threat is real or merely a trick of the mind.

Where Can You Buy The Mound: Omen of Cthulhu?

The game is currently available for purchase across all major digital storefronts. PC players can find it directly on the Steam Store Page, where a special launch discount is active alongside a Deluxe Edition containing the exclusive Temple of Yig mission pack. Console players can pick up the game digitally via the PlayStation Store or the Xbox Marketplace. If your squad successfully survives the horrors of the expedition and returns to the galleon with enough loot, El Capitan will reward you with upgrades, only to immediately offer even more dangerous contracts.