
How to activate
- Install Steam and sign in to your account (a free account is enough).
- In the top menu choose Games → Activate a Product on Steam…
- Enter your key exactly as shown in your order (with dashes) and confirm. The game appears in your library.
About
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.
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. ...
System Requirements
Minimum
- Windows
- 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
- Windows
- 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



























