Kumitantei: Old-School Slaughter
Mango Factory · Akupara Games · 2026-04-23
SteamGOG
Modes: Single player
Releases: Apr 23, 2026 (PC (Microsoft Windows))
Kill each other...for science! The class of '89 is trapped in an elite school killing game. Investigate, solve, and expose your classmates in Kumitantei™: Old-School Slaughter, an episodic murder-mystery ADV card-battler inspired by retro anime.
Kumitantei: Old-School Slaughter is an Adventure, Indie and RPG game released in 2026, priced at $14.99, with a Very Positive review sentiment (92% of 336 reviews).
Himari Sanada is an ordinary girl who's had the greatest Imperial honor for students thrust upon her: an Absolute title and admission to the prestigious military research academy Janus Institute. The morning of her first day however, she does not wake up in her bedroom, instead finding herself trapped alongside 15 other Absolute students within a decaying old bunker seemingly built by their new school. Confronted by a strange two-faced cat, the class learns they've been brought here as test subjects in a kill-or-be-killed Apathy Experiment designed to fracture and drain their very humanity. H(Storyline via IGDB)
Health check
- · 40 reviews in the last 8 weeks (~5/week).
- · Review velocity down 84% vs the prior 8 weeks.
- · Current weekly pace is under 5% of the all-time peak week (145 reviews).
- · Top 47% of 11,362 Adventure games in the census by review count.
Review-multiple estimate from 336 total reviews — how this is computed.
Current store prices
| GOG | $11.99 | -20% |
Deal snapshots via CheapShark, refreshed daily.
All-time low: $7.19 at IndieGala Store (2026-05-05)via IsThereAnyDeal
12-month high $14.99 · on sale 28 of 39 observed days · $4.80 above the all-time low (census price snapshots)
Review momentum
Price history
Completion
- · 80.1% of players earned Absolute Orientation
- · 64.1% of players earned Absolute Initiation
- · 4.8% of players earned Up All Aces
Global achievement rates from Steam.
Details
3 supported languages: English, Spanish - Spain, Japanese
Console footprint
| Platform | Players tracked | Completion | Trophies/achievements |
|---|---|---|---|
| Steam (Steam) | 63 | 14% | 11 |
Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.
Census log
- 2026-04-23First review activity on record (week of 2026-04-23).
- 2026-04-23Biggest review week on record: 145 reviews (week of 2026-04-23).
Computed from census-recorded observations only — dates are observation dates.
Recent updates
Players also track
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Similarity via IGDB.