Kumitantei: Old-School Slaughter

A murder-mystery visual novel with deckbuilding and deadly class trials

Mango Factory · Published by Akupara Games · Released Apr 23, 2026

Reviews: Very Positive; 88% of 334
Recent reviews: Not enough recent
Players: 4; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 5 months ago; May 16, 2026
Minimum PC: GeForce GTX 1050 Ti; 4 GB RAM · 6 GB disk; Full requirements

What is Kumitantei: Old-School Slaughter?

Set in an alternate-history Japan in 1989, this episodic visual novel follows elite students trapped in a bunker for a killing experiment. You search crime scenes, collect evidence, and use cards to argue your case at trials. Spending time with classmates and giving gifts earns more cards for your deck.

For you if...

+you enjoy retro anime mixed with psychological horror
+you like combining detective work with card battles

Not for you if...

−you want a complete story rather than episodic releases
−you prefer action-heavy games over reading and dialogue

What players say

88% of 334 reviews are positive

Players praise the cast, visuals, and animation. The most common criticism is its close resemblance to Danganronpa, while some players also find the card battles underdeveloped.

Screenshots and trailer

Kumitantei: Old-School Slaughter screenshot 1

Kumitantei: Old-School Slaughter system requirements

Minimum: GeForce GTX 1050 Ti, 4 GB RAM, 6 GB of disk space.

As published by the developer.

Can my PC run Kumitantei: Old-School Slaughter?

Tell us your graphics card once and every game page will answer this for you.

Set up my PC →

Minimum

OS: Windows 10 (64-bit)
Processor: 6th Gen i5/1st Gen Ryzen Series
Graphics: NVIDIA GeForce GTX 1050 Ti / AMD Radeon RX 570 (4GB dedicated VRAM)
Memory: 4 GB RAM
Storage: 6 GB available space
DirectX: Version 12

Does Kumitantei: Old-School Slaughter have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Kumitantei: Old-School Slaughter run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck
External controllers are not supported for the primary player

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 11
Steam features: Cloud saves, Family Sharing, Trading cards
Languages: Full audio: English. Text only: Spanish - Spain, Japanese, Simplified Chinese.

Does Kumitantei: Old-School Slaughter use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam