Kumitantei: Old-School Slaughter - Player count and game stats

Kumitantei: Old-School Slaughter is tagged as Adventure, Indie, RPG. It is published by Mango Factory (developer) and Akupara Games (publisher) and released on 23 Apr, 2026. This page tracks live Steam player counts, historical peaks, and regional pricing. and the all-time peak was 187 concurrent players on 24 April 2026.

Kumitantei: Old-School Slaughter header image

Developer: Mango Factory

Publisher: Akupara Games

Platforms:

Release Date: 23 Apr, 2026

Official site On Steam Details

Est. sales: 11,220 High confidence

Top-selling rank: #830 YTD

About Kumitantei: Old-School Slaughter

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.

More Kumitantei: Old-School Slaughter Details

Is survival in the cards?

Kumitantei™: Old-School Slaughter is an episodic murder-mystery ADV cardbattler that lovingly fuses retro anime analog horror with killing game! Kumitantei will consist of 6 episodes, beginning to release in early 2026.

"The Empire of Japan, 1989... Awoken in a decaying old bunker, sixteen elite Absolute Students are trapped in a kill-or-be-killed Apathy Experiment. Will they band together to uncover secrets of this anemoic alternate past, or lose their humanity and lives in the present?"

With a visual style inspired by Rumiko Takahashi’s Urusei Yatsura and '80s anime alongside classic Japanese mystery-adventure games like Danganronpa and Ace Attorney, Kumitantei™ thrusts you into a suspenseful character-driven killing game narrative where your deckbuilding and detective skills are the only keys to surviving. It's a creepy-cute love letter to decades of ADVs that wears its many inspirations on its sleeve: perfect for fans of visual novels, detective games, and deckbuilders with deep narratives.

Features:

Bond with your classmates! Get to know the Absolute Class of '89 by listening to them, giving them gifts, and receiving powerful cards to use during debates!
Investigate grisly murders! Use your detective skills to comb through slain classmates’ crime scenes and take your evidence to trial!
Survive the trial! Cut through the lies and prove your case. Inspired by Ace Attorney and the cult classic Danganronpa series, Clinical Trials can only end in bloodshed, whether it's the culprit's or everyone else's!
Build your deck! Create absolute combos using cards you find in the Bunker and through bonding with your classmates to dominate the debates and trials!
Please insert coin! Test your retro gaming skills in a variety of faithfully crafted anemoic riffs on true old-school arcade icons!

Controller Support: full
Genres: Adventure, Indie, RPG
Categories: Single-player, Steam Achievements, Full controller support, Steam Trading Cards, Custom Volume Controls, Adjustable Difficulty, DualShock Controller Support, DualShock Controller Support, DualSense Controller Support, DualSense Controller Support, Save Anytime, Steam Cloud, Family Sharing
Supported Languages: English*, Spanish - Spain, Japanese, Simplified Chinese *languages with full audio support
Last Checked: 2026-08-02T09:17:11.634Z

Peak Concurrent Players

Loading peak stats…

Hourly Daily Monthly Yearly

Daily Monthly Yearly

PC System Requirements

Price History

Your Selected Region: -

Player Reviews

Loading reviews…

Official Announcements

Loading official news…

News from the media

Games like this

Games released in the last 12 months with similar themes, genres, categories, and wishlist tier.

Kumitantei: Old-School Slaughter - Player count and game stats

Peak Concurrent Players

PC System Requirements

Price History

Player Reviews

Player Reviews by Day

Official Announcements

News from the media

Games like this

Narin: The Orange Room

Dark Atlas: Infernum

16叠谋杀之谜

Comatose

House of Necrosis