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Psycho-Sleuth traps 13 players in a deadly game, each bound by strange cognitive conditions—like "no lying," "no left side," or "no faces." These disorders are contagious, and the killer hides behind abnormal logic. A mysterious cult known as Li has seized control of a gothic cathedral, and the "Afflicted Ones" must kill without getting caught to ascend to godhood.

Psycho-Sleuth is a mystery deduction game that fuses classic whodunit elements with cognitive distortion mechanics. Through a unique debate mechanic known as "Argument Space," players engage in high-stakes logic battles where the truth is forced out of lies, and perception collapses under pressure. In Debate Mode, you rapidly judge every statement—accept their words or strike back with the right clue. Every battle tests your logic, instincts, and time management.

Disease Abilities directly alter what players see and how they experience the investigation, distorting crime scenes and casting doubt on every testimony. Crime scenes are not what they seem. Witness bodies without faces, missing evidence, and spaces erased by perception. The game features over 500,000 characters of script, fully voiced key scenes in Japanese, more than 40 CGs, 3D backgrounds, Live2D animation for the 13 main characters, and over 50 original tracks.

Producer Xiaolu designed this title as an homage to investigation games like Danganronpa and Ace Attorney, while embedding cognitive disorders directly into the core of the mystery rather than following the genre's traditional formula. Psycho-Sleuth stands apart by making mental illness integral to the puzzle itself—not a backdrop, but the mechanism that warps evidence, testimony, and reality. This creates a fresh angle on the death-game mystery genre.

Psycho-Sleuth appeals to fans of psychological mysteries, visual novels, and deduction games who seek narratives that challenge both logic and empathy. The game's mature themes and complex character work make it ideal for players who appreciate story-driven experiences with genuine emotional weight.