The Mound: Omen of Cthulhu Demo Lands on Steam Ahead of July Release
The demo gives players a first look at ACE Team's Lovecraftian co-op horror, with a Madness System designed to break trust between party members.
Reporting from 1 sources: Denfaminicogamer.
Nacon released a demo for The Mound: Omen of Cthulhu, a 4-player co-op horror game from ACE Team, on Steam on June 16. The full game launches July 15, 2026 on PS5, Xbox Series X|S, and PC. Players explore a cursed jungle for infinite wealth, with a Madness System that distorts perception.
The demo for The Mound: Omen of Cthulhu went live on Steam on June 16, giving players a taste of ACE Team's 4-player co-op horror set in a jungle inspired by H.P. Lovecraft's Cthulhu Mythos. The full game is due July 15, 2026 on PS5, Xbox Series X|S, and PC. Players search for a cursed treasure called The Mound, selecting exploration zones from a galleon base and sharing weapons and supplies. The Madness System is the game's central mechanic: it distorts what players see and hear, making hallucinations and real threats indistinguishable and driving paranoia within the group.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.