マーダーミステリーパラドクス このひと夏の十五年

213℉ · 2023 · $19.99 · Adventure · deal grade B

Measured on 2026-09-23 23:20 UTC, 12 days ago. The whole catalog is re-measured daily; a game that just launched can move fast between passes.

• Estimated net residual revenue: $305 to $458 per month
• Opportunity: $496 per month at x1.30 dormancy
• Estimated lifetime owners: 10.1k
• 86% positive across 288 reviews · 3.1 reviews/month

Why it's flagged

• Developer active, last post 10 months ago
• Store page localized in only 1 language(s)

Analyst notes (AI-assisted)

Note written 2026-09-12; the live figures above take precedence over any numbers in it.

A Japanese narrative adventure adapting tabletop murder-mystery mechanics into a single-player time-loop mystery set on an island.

This is a quiet, high-engagement title with strong narrative retention (86% positive, 15-hour median playtime) published by a major anime studio but severely constrained by Japanese-language gatekeeping: only 2 of 249 Steam reviews are in English, and localization gaps block 20% of the addressable market. The residual revenue is modest but steady, and the core mystery design resonates with players who find it. For a publisher or localization partner, a full English translation could unlock a dormant mid-tier visual-novel audience; for Aniplex, a revival campaign tied to anime or streaming media could justify the lift. Most realistic play: publishing.

• Risk: Primary audience is Japanese-speaking players; English-language players report relying on machine translation, indicating severe friction in the West.
• Risk: No workshop, achievements, or cloud save support suggest a minimal live-service footprint and limited player-retention hooks.
• Risk: Developer 213℉ has only one shipped title on record; studio maturity and localization capacity are unproven.

This case as Markdown · Estimates carry ±30-50% error per title.