Video Game Data

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.

Developer: Mango Factory Mango Factory LLC.

Publisher: Akupara Games Mango Factory LLC.

Genres: Adventure RPG

Tags: 1980s Adventure Alternate History Anime Card Battler Comedy Cute Dark Humor Deckbuilding Detective Female Protagonist Horror Memes Multiple Endings Mystery Psychological Horror RPG Retro Singleplayer Visual Novel

Release Date: April 23, 2026

Reviews: 0 (Followers)

Followers: 814

Platforms: Windows

Languages: English*, Spanish - Spain, Japanese, Simplified Chinese<br>*languages with full audio support

Steam Achievements: None

Estimated Wishlists: 8,140

Kumitantei: Old-School Slaughter on Steam

Categories: Adjustable Difficulty Custom Volume Controls Family Sharing Full controller support Save Anytime Single-player Steam Achievements Steam Cloud Steam Trading Cards