Also known as Kumitantei: Old-School Slaughter, koss, 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.
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26 updates
Top picks from 11 Steam achievements, sorted by player unlock rates.
