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Kumitantei: Old-School Slaughter

Planned Release Date: 2026.
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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.
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About Kumitantei: Old-School Slaughter

About this game

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!

 

Game Details

Platform:
steam
Developer:
Mango Factory
Publisher:
Akupara Games
Supported Languages:
English
Link:
Genres:
Visual Novel
Card Battler

Adventure

RPG

Deckbuilding
Themes:
Comedy
Anime

Detective

1980s

Horror

Mystery

Alternate History

Psychological Horror

Dark Humor

Female Protagonist

Retro

Cute

Memes
Play Styles:
Singleplayer
Multiple Endings
Features:
Singleplayer
Steam achievements

Full controller support

Steam trading cards

Custom volume controls

Save anytime

Steam cloud

Family sharing

Product Requirements

Minimum:

  • OS: Windows 10
  • Processor: 5th Gen i5/1st Gen Ryzen Series
  • Memory: 4 GB RAM
  • Graphics: GeForce 900 Series/Radeon RX Series
  • DirectX: Version 12
  • Storage: 5 GB available space

Recommended:

  • OS: Windows 10
  • Processor: 8th Gen i5/3rd Gen Ryzen Series
  • Memory: 6 GB RAM
  • Graphics: RTX 2000 Series/Radeon Vega Series
  • Storage: 5 GB available space

Frequently Asked Questions

2026
Minimum:
  • OS: Windows 10
  • Processor: 5th Gen i5/1st Gen Ryzen Series
  • Memory: 4 GB RAM
  • Graphics: GeForce 900 Series/Radeon RX Series
  • DirectX: Version 12
  • Storage: 5 GB available space
Recommended:
  • OS: Windows 10
  • Processor: 8th Gen i5/3rd Gen Ryzen Series
  • Memory: 6 GB RAM
  • Graphics: RTX 2000 Series/Radeon Vega Series
  • Storage: 5 GB available space
Kumitantei: Old-School Slaughter is published by Akupara Games
Kumitantei: Old-School Slaughter was developed by Mango Factory
Fanatical users tagged Kumitantei: Old-School Slaughter as Visual Novel, Card Battler, Adventure, and RPG
Fanatical users tagged Kumitantei: Old-School Slaughter as Comedy, Anime, Detective, and 1980s
Yes, Fanatical users tagged Kumitantei: Old-School Slaughter as Visual Novel
Yes, Fanatical users tagged Kumitantei: Old-School Slaughter as Card Battler
Yes, Fanatical users tagged Kumitantei: Old-School Slaughter as Adventure

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© 2026 Mango Factory LLC. All rights reserved.

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