About

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.

Released · Steam · App 2759280

Kumitantei: Old-School Slaughter

Mango Factory · published by Akupara Games

Open in Steam ↗Sign in to save Compare ⇆Pro

Website ↗

Genres

AdventureIndieRPG

Categories

Single-playerSteam AchievementsFull controller supportSteam Trading CardsCustom Volume ControlsAdjustable DifficultyDualShock Controller SupportDualShock Controller SupportDualShock Controller SupportDualShock Controller SupportSave AnytimeSteam CloudFamily Sharing

Player tags

ComedyAnimeVisual NovelDetectiveCard BattlerMystery1980sHorrorAlternate HistorySingleplayerAdventurePsychological HorrorDark HumorFemale ProtagonistRPGRetroCuteMemesDeckbuildingMultiple Endings

Followers

0

+0 · 1d

Wishlists est

0

Price

14.99

USD

Release

Apr 23, 2026

released

Followers history

Week Month YearPro AllPro CustomPro

29 snapshots· cumulative· 29 carried

+0 (+0.0%)

DayFollowersΔΔ %WishlistsΔΔ %

Jul 6, 202600—00—

Jul 5, 202600—00—

Jul 4, 202600—00—

Jul 3, 202600—00—

Jul 2, 202600—00—

Jul 1, 202600—00—

Jun 30, 202600—00—

Jun 29, 202600—00—

Jun 28, 202600—00—

Jun 27, 202600—00—

Jun 26, 202600—00—

Jun 25, 202600—00—

Jun 24, 202600—00—

Jun 23, 202600—00—

Jun 22, 202600—00—

Jun 21, 202600—00—

Jun 20, 202600—00—

Jun 19, 202600—00—

Jun 18, 202600—00—

Jun 17, 202600—00—

Jun 16, 202600—00—

Jun 15, 202600—00—

Jun 14, 202600—00—

Jun 13, 202600—00—

Jun 12, 202600—00—

Jun 11, 202600—00—

Jun 10, 202600—00—

Jun 9, 202600—00—

Jun 8, 20260——0——

Tracked since May 6, 2026·Details 4d ago