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. Summary: IGDB
Mind Score
Fair to the player
Respect
92
Nourish
44
Stimulation
moderate
Unknown lengthStop anytime
What it exercises
Problem solving
- IGDB keyword “murder mystery”
Exploration and curiosity
- Wikipedia: built around exploration
Medium confidence · 28 Sept 2026 · Rules-based estimate from the Steam store, player reviews and PEGI/ESRB descriptors. Not a substitute for the official rating or your own judgement. Tap a label to see the evidence.