65%Strong matchProject Unknown
88%41688% positive reviews, Very Positive across 416 reviews·Horror · Multiplayer
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1–4 player co-op Lovecraftian horror. Investigate paranormal phenomena across unstable dimensions, identify the entity haunting each world, extract primordial energy and escape before the wormhole collapses.
Expedition to Madness
SteamExpedition to Madness is a 1–4 player co-op Lovecraftian investigation horror game where you enter unstable dimensions, study impossible phenomena, identify the entity haunting each world, and decide how much longer you dare remain.
You are part of an inter-dimensional expedition searching for your missing partner, Emily, lost somewhere beyond the folds of reality. Each mission sends you through a wormhole into a corrupted world filled with signs, anomalies, and ancient intelligences that do not want to be understood.
This is not just about survival. Study the environment. Track manifestations. Gather clues. Compare evidence. Determine what kind of cosmic presence has taken hold before it is too late.

Every dimension hides its own logic, its own threats, and its own truths. Misread the signs, and your team may not make it back.
Traverse unstable wormholes into terrifying parallel dimensions inspired by Lovecraft’s most iconic stories. From the icy ruins of At the Mountains of Madness to the cursed coastlines of Innsmouth, each mission takes you deeper into a multiverse of horrors and hidden truths.

Collect primordial energy, recover ancient artifacts, and piece together clues from Emily’s scattered journal. But be warned: unspeakable entities hunt in the dark, and the deeper you go, the harder it is to return.

Survive the unknown. Stabilize the wormhole. Discover what happened to her and escape with what you found before the dimension collapses around you.
Some entities can be avoided. Some can be resisted. Some should never be approached at all.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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