The demo is the right first step with this game. It is free, it is short, and it contains the whole first chapter rather than a slice that stops mid-mechanic.
A demo released in September 2025 for a November 2026 launch is a project that was iterating on its systems for over a year before shipping. That usually means the deduction loops were tested hard — and it is also why the cast is complete in the demo rather than padded with placeholders.
The full game launched on November 5, 2026 on Steam, Epic Games Store and the Smilegate STOVE platform simultaneously. Steam app ID is 3432860; the demo is 3753800. The listed play time is about 1,200 minutes.
Presentation is the other reason to look: Live2D character art, full voice acting, and Traditional Chinese, Simplified Chinese, Japanese, English and Korean — all five fully voiced. For a language-localized VN audience that is a genuinely rare amount of coverage.
Before release, Psycho-Sleuth took the Streamer Award (主播獎) at the SHIBA GAME AWARD 2025 Winter competition. That award is voted on by viewers and streamers, so it is a direct signal about how well the game performs as something to watch — which, for a game built on Live2D performance and dense dialogue, is the right metric.
PHOSEPO is a Taiwan-based studio whose team previously worked on the now-defunct Reversal Ark (倒轉方舟) project. It is a small team that came out of a shutdown and shipped something with twenty hours of fully-voiced script and a mechanical deduction system — which is worth knowing when you are deciding how much to trust the roadmap of a studio with one released game.