Kumitantei: Old-School Slaughter
| App ID | 2759280 |
| App Type | Game |
| Developer | Mango Factory LLC. |
| Publisher | Mango Factory LLC. |
| Franchise | Kumitantei |
| Last Changenumber | 31685080 |
| Last Record Update | 15 October 2025 – 13:46:26 UTC ( |
| Release Date | Q1 2026 |
Janus Institute's Class of '89 are trapped and forced to kill each other 'for science', is survival in the cards? Kumitantei™: Old-School Slaughter is an episodic murder-mystery ADV card-battler that lovingly fuses retro anime and killing game!
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 | Q1 2026 | |||||||||||||||||||
| 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/ |
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| Primary Genre | Adventure (25) | |||||||||||||||||||
| Store Genres | Adventure (25), RPG (3) | |||||||||||||||||||
| Store Asset Modification Time | 4 September 2025 – 01:08:28 UTC ( |
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| library_assets |
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| 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 ( |
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| Content Descriptors (Including DLC) | Some Nudity or Sexual Content (1), Frequent Violence or Gore (2), General Mature Content (5) | |||||||||||||||||||
Supported Languages
| 2 Languages | Interface | Full Audio | Subtitles |
|---|---|---|---|
| English | Yes | Yes | Yes |
| Japanese | Yes | Yes |
Tags
Categories
Hardware Categories
Full Controller Support
DualShock Controllers (USB Only)
DualShock Controllers
DualSense Controllers (USB Only)
DualSense Controllers
Steam Input API Supported
Gamepad Preferred
Assets
Load all asset images
| trailer_name | KT:OSS - Episode 1 Trailer (PREVIEW) |
| trailer_category | 1 |
| trailer_480p ↴ | |
| video/webm | 257182225/movie480_vp9.webm |
| video/mp4 | 257182225/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 257182225/movie_max_vp9.webm |
| video/mp4 | 257182225/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 2759280/973757426/8c93418533199773dc74d20664bbd70262b42722/1755020059/microtrailer.webm |
| video/mp4 | 2759280/973757426/8c93418533199773dc74d20664bbd70262b42722/1755020059/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 2759280/973757426/8c93418533199773dc74d20664bbd70262b42722/1755020059/dash_av1.mpd |
| dash_h264 | 2759280/973757426/8c93418533199773dc74d20664bbd70262b42722/1755020059/dash_h264.mpd |
| hls_h264 | 2759280/973757426/8c93418533199773dc74d20664bbd70262b42722/1755020059/hls_264_master.m3u8 |
| screenshot_medium | 257182225/f472ea3515ec53d1b48aabd6fc78103f6ecb907d/movie_600x337.jpg |
| screenshot_full | 257182225/f472ea3515ec53d1b48aabd6fc78103f6ecb907d/movie_full.jpg |
| all_ages | true |
| is_highlight | true |
| timestamp | 12 August 2025 – 18:08:59 UTC |
| trailer_name | KT:OSS - Gameplay Trailer |
| trailer_category | 1 |
| trailer_480p ↴ | |
| video/webm | 257025971/movie480_vp9.webm |
| video/mp4 | 257025971/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 257025971/movie_max_vp9.webm |
| video/mp4 | 257025971/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 2759280/705259/bbd9c93975a875e567aa05d31c5726ccf226ae39/1750897604/microtrailer.webm |
| video/mp4 | 2759280/705259/bbd9c93975a875e567aa05d31c5726ccf226ae39/1750897604/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 2759280/705259/bbd9c93975a875e567aa05d31c5726ccf226ae39/1750897604/dash_av1.mpd |
| dash_h264 | 2759280/705259/bbd9c93975a875e567aa05d31c5726ccf226ae39/1750897604/dash_h264.mpd |
| hls_h264 | 2759280/705259/bbd9c93975a875e567aa05d31c5726ccf226ae39/1750897604/hls_264_master.m3u8 |
| screenshot_medium | 257025971/movie.293x165.jpg |
| screenshot_full | 257025971/movie_full.jpg |
| all_ages | true |
| is_highlight | true |
| timestamp | 2 July 2024 – 07:32:04 UTC |
| trailer_name | KT:OSS - Voice Cast Trailer |
| trailer_category | 3 |
| trailer_480p ↴ | |
| video/webm | 257154168/movie480_vp9.webm |
| video/mp4 | 257154168/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 257154168/movie_max_vp9.webm |
| video/mp4 | 257154168/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 2759280/468979417/c393abb4a06b030977ddacfc9f86ea5531196d26/1750900138/microtrailer.webm |
| video/mp4 | 2759280/468979417/c393abb4a06b030977ddacfc9f86ea5531196d26/1750900138/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 2759280/468979417/c393abb4a06b030977ddacfc9f86ea5531196d26/1750900138/dash_av1.mpd |
| dash_h264 | 2759280/468979417/c393abb4a06b030977ddacfc9f86ea5531196d26/1750900138/dash_h264.mpd |
| hls_h264 | 2759280/468979417/c393abb4a06b030977ddacfc9f86ea5531196d26/1750900138/hls_264_master.m3u8 |
| screenshot_medium | 257154168/4690398d61b42ef23f18311a80d7de184498c7b4/movie_600x337.jpg |
| screenshot_full | 257154168/4690398d61b42ef23f18311a80d7de184498c7b4/movie_full.jpg |
| all_ages | true |
| is_highlight | true |
| timestamp | 9 June 2025 – 13:48:41 UTC |
| trailer_name | KT:OSS - Reveal Trailer |
| trailer_category | 2 |
| trailer_480p ↴ | |
| video/webm | 256991268/movie480_vp9.webm |
| video/mp4 | 256991268/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 256991268/movie_max_vp9.webm |
| video/mp4 | 256991268/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 2759280/644586/d862c8bb33eeb36e40c5a22446e66b47fb249bbc/1750897601/microtrailer.webm |
| video/mp4 | 2759280/644586/d862c8bb33eeb36e40c5a22446e66b47fb249bbc/1750897601/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 2759280/644586/d862c8bb33eeb36e40c5a22446e66b47fb249bbc/1750897601/dash_av1.mpd |
| dash_h264 | 2759280/644586/d862c8bb33eeb36e40c5a22446e66b47fb249bbc/1750897601/dash_h264.mpd |
| hls_h264 | 2759280/644586/d862c8bb33eeb36e40c5a22446e66b47fb249bbc/1750897601/hls_264_master.m3u8 |
| screenshot_medium | 256991268/movie.293x165.jpg |
| screenshot_full | 256991268/movie_full.jpg |
| all_ages | true |
| timestamp | 12 August 2025 – 18:09:01 UTC |
