Kumitantei: Old-School Slaughter Demo Version

About the game

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.

Current players

Updated Nov 12, 8:42 PM

24hr peak

Highest count in the last 24 hours

All time peak

Highest count in recorded history

Player history

146 observations in viewHistorical player data prior to Sept 2026 is from steamcharts.com.Nov 5, 2026, 9:52 PM – Nov 12, 2026, 8:42 PM

Game details

Rankings: Most Played#115,005
Developer: Mango Factory
Publisher: Akupara Games
Release date: Sep 6, 2024, 12:53 PM
Languages: English
Price: Free to play
Platforms: Windows
Features: Feature names
Single-player
Full controller support
DualShock Controller Support
DualSense Controller Support
Steam Input API Support
Gamepad Recommended
Tags: Comedy Anime Visual Novel Detective Mystery