Kumitantei: Old-School Slaughter
PC (Microsoft Windows)
Mango Factory · Published by Akupara Games
Released April 23, 2026
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.
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Genres
Adventure
Indie
Visual Novel
Card & Board Game
Themes
Action
Horror
Thriller
Historical
Comedy
Mystery
Game Modes
Single player
Companies
Mango Factory (Developer)
Akupara Games (Publisher)
Also Known As
Kumitantei: Shouwa no Satsuriku mu Kandou Gakuen · Kumitantei.exe