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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.

Release
Apr 23, 2026
Player reviews
90% positive · 318 reviews
Platforms
Windows
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Catalog information from Steam. Pricing and availability can change; confirm them on the Steam store.