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Kumitantei: Old-School Slaughter
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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.
PC (Microsoft Windows) · Apr 23, 2026
Worldwide · Exact date · Full release · IGDB
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11 achievements available.
Complete the Prologue.
LockedSteam
Discover the first body.
LockedSteam
Complete Episode 1.
LockedSteam
Hidden until unlockedSteam
Increase a Bond through Free Time Event.
LockedSteam
Receive a Gift from the Kitty Catcher.
LockedSteam
Play Merlite in the Prize Corner and complete Level 3.
LockedSteam
Complete any Clinical Trial with an A ranking.
LockedSteam
Perform an Ace Counter in War of Words.
LockedSteam
Complete any Clinical Trial while performing every Ace Counter.
LockedSteam
Hidden until unlockedSteam
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