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Kumitantei: Old-School Slaughter

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App ID 2759280
App Type Game
Developer
Publisher Mango Factory LLC.
Franchise Kumitantei
Last Changenumber 30114853
Last Record Update 17 July 2025 – 16:20:10 UTC ()
Release Date 22 September 2025 – 13:00:00 UTC ()

Janus Institute's Class of '89 are trapped and forced to kill each other 'for science', is survival in the cards? A murder-mystery tribute to retro anime and pop culture of 1980's Japan, underlined with a dark twist of horror and conspiracy!

Additional Information

This game is excluded from Steam Family Sharing because: This game has not yet been released

Developer Mango Factory LLC.
controller_support full
ReleaseState prerelease
Publisher Mango Factory LLC.
Exclude from family sharing (exfgls) 8 (This game has not yet been released)
Store Release Date 22 September 2025 – 13:00:00 UTC ()
community_hub_visible Yes
Social Media https://bsky.app/profile/kumitantei.com
https://discord.gg/mangofactory
https://www.reddit.com/r/kumitantei/
https://x.com/Kumitantei
https://www.youtube.com/@mangofactoryen/
Primary Genre Adventure (25)
Store Genres Action (1), Adventure (25), Indie (23), RPG (3)
Store Asset Modification Time 19 June 2025 – 03:44:09 UTC () (1750304649)
library_assets
library_capsuleen
library_heroen
library_hero_bluren
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library_headeren
logo_position ↴
pinned_positionBottomCenter
width_pct32.14958348015958
height_pct63.237805767965554
Content Descriptors Some Nudity or Sexual Content (1), Frequent Violence or Gore (2), General Mature Content (5)
controllertagwizard Yes
First seen on SteamDB 27 December 2023 – 20:11:00 UTC (), in changelist #21689967
Content Descriptors (Including DLC) Some Nudity or Sexual Content (1), Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

3 Languages Interface Full Audio Subtitles
English Yes Yes Yes
Indonesian Yes Yes
Japanese Yes Yes

Tags

🗺️ Adventure 🌸 Anime 😱 Horror 🎸 1980s 🃏 Card Battler 🗺 Exploration 📚 Visual Novel 🕰️ Alternate History 🕵️ Detective 👩 Female Protagonist 🧸 Cute 🤫 Mystery 🃏 Card Game 🙌 First-Person 🧛🏻 Dark Comedy 🕴 Psychological Horror 👾 Pixel Graphics 🎲 RPG 💥 Action 📚 Story Rich

Categories

Single-player Steam Achievements Family Sharing Steam is learning

Hardware Categories

Full Controller Support DualShock Controllers (USB Only) DualShock Controllers DualSense Controllers (USB Only) DualSense Controllers Steam Input API Supported Gamepad Preferred

Assets

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library_logo ↴
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Assets
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timestamp17 July 2025 – 16:20:04 UTC
Trailers
257154168 ↴
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Packages

SubID Name Billing Type Last Update
986753 Steam Sub 986753 CD Key 21 October 2024 – 17:09:50 UTC

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