Fight Mental Disorder in Psycho-Sleuth
The wait is over. Psycho Sleuth, the upcoming psychological mystery adventure from PHOSEPO, has officially launched its Steam store page and is now open for wishlisting.
Set within the haunting halls of a massive cathedral, Psycho Sleuth takes players deep into a world where perception can no longer be trusted. Reality bends and twists under the weight of the minds that inhabit it, each character afflicted with a different cognitive distortion. From obsessive-compulsive disorder to synesthesia, every suspect sees the world in a unique and often unsettling way.

You take on the role of a determined truth seeker, drawn into a deadly mystery that defies logic and clarity. To uncover the killer, you’ll have to navigate more than just shifting narratives. The game’s signature “Argument Space” mechanic lets you confront suspects in tense logic duels, where you unravel lies and expose contradictions. These encounters challenge not only your reasoning skills but your grip on what’s real.
As you probe deeper into the mystery, the line between sanity and madness begins to blur. What starts as a simple investigation becomes a descent into the fractured minds of others and perhaps your own.
Psycho Sleuth promises a narrative-rich experience filled with psychological depth and cerebral gameplay. If you’re into mysteries that challenge perception and reward deduction, it is now available to wishlist on Steam. Check out the official trailer below.