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.
Last Updated: 5/9/2026
| Steam Price | $14.99 |
| Release Date | 4/23/2026 |
| Franchise | Mango Factory LLC |
| Developers | |
| Publishers | |
| Steam App Id | 2759280 |
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.
Last Updated: 5/9/2026
- Windows
- Mac
- Linux
- Steam Deck (Verified)
About Kumitantei: Old-School Slaughter
Kumitantei: Old-School Slaughter is an Indie, Adventure, Action, and RPG game developed by Mango Factory, Mango Factory Ltd., and Mango Factory LLC. On 4/23/2026, it was released on the Steam Store by Mango Factory Ltd., Akupara Games, and Mango Factory LLC.
It can be played and ran on Windows systems. It is verified by Valve as playable on the Steam Deck and will run well.
According to Steam’s category system, Kumitantei: Old-School Slaughter supports the following features:
- Full controller support
- Steam Trading Cards
- Custom Volume Controls
- Family Sharing
- Captions available
- Steam Achievements
- Adjustable Difficulty
- Single-player
- Steam Cloud
- Save Anytime
- Partial Controller Support
From the Steam community, Kumitantei: Old-School Slaughter has been tagged with the following user tags:
- Multiple Endings
- Visual Novel
- Deckbuilding
- RPG
- Dark Humor
- Comedy
- Psychological Horror
- Retro
- Mystery
- 1980s
- Horror
- Cute
- Detective
- Card Battler
- Anime
- Alternate History
- Adventure
- Female Protagonist
- Singleplayer
- Memes
Media & Sceenshots
Watch the featured video for Kumitantei: Old-School Slaughter and see the latest screenshots from the Steam Store.
Kumitantei: Old-School Slaughter DLC
Kumitantei: Old-School Slaughter has 1 related app available for download from the Steam store.
| Image | Name | Type | Release Date | Actions |
|---|---|---|---|---|
 | Kumitantei: Old-School Slaughter Original Soundtrack | Music | 4/23/2026 | Steam Charts |
Related Bundles
Kumitantei: Old-School Slaughter is included in 4 bundles in the Steam Store. Purchasing through a bundle can give a large discount off the game's base price if you are willing to purchase multiple apps all at once.
| Image | Name | Apps | Packages | Price | Actions |
|---|---|---|---|---|---|
 | Kumitantei × The Real Face of a VTuber | 2 | 1 | $24.28 | View |
 | Absolute Paradise | 2 | 2 | $31.48 | View |
 | Kumitantei: Old School Slaughter Deluxe Edition | 2 | 2 | $22.48 | View |
 | RUBATANTEI | 1 | 2 | $30.13 | View |
Related Packages
Kumitantei: Old-School Slaughter is referenced by 1 package in the Steam Store. A package (or sub) is simply an item that can be purchased on Steam.
| Name | Price | Actions |
|---|---|---|
| Kumitantei: Old-School Slaughter | $13.49 | View |
Supported Languages and Localizations
Kumitantei: Old-School Slaughter is available in 4 different languages with varying levels of support for the in-game interface, audio, and fully translated subtitles.
| Name | Interface | Audio | Subtitles |
|---|---|---|---|
| English | Yes | Yes | Yes |
| Spanish (Spain) | Yes | No | Yes |
| Japanese | Yes | No | Yes |
| Chinese (Simplified) | Yes | No | Yes |
Discover Similar Games
Find a new game to play just like Kumitantei: Old-School Slaughter through our curated lists. Steambase uses Steam's User Tag and Genre system (and other game stats) to curate a list of the best and most loved games similar to Kumitantei: Old-School Slaughter.
Features & Categories
Frequently Asked Questions
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Data is enriched, cleansed, verified, and updated in real-time to ensure we surface the most up-to-date information. Learn more about the Steambase approach to data collection.
Kumitantei: Old-School Slaughter data has been sourced from:
- Valve Corporation. (2026, May 9). Kumitantei: Old-School Slaughter on Steam. Steam Store.
- Valve Corporation. (2026, May 9). Kumitantei: Old-School Slaughter. Steam Community Hub.
- Mango Factory. (2024, January 4). Kumitantei: Old-School Slaughter. Kumitantei: Old-School Slaughter.