マーダーミステリーパラドクスこのひと夏の十五年

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App ID	2203040
App Type	Game
Developer	213℉
Publisher	Aniplex Inc.
Supported Systems	Windows
Last Changenumber	30215589
Last Record Update	23 July 2025 – 22:12:00 UTC ()
Release Date	1 December 2023 – 14:50:49 UTC ()

❓ 78.58%

204 reviews

In-Game

"Murder Mystery Paradox: Fifteen Years of Summer" is a text-based adventure game. Enter the remote and sparsely populated island of Shikinejima and attempt to solve the strangely recurring mystery found there.

Additional Information

Developer

213℉

controller_support

partial

DLCAvailableOnStore

Yes

ReleaseState

released

Publisher

Aniplex Inc.

Store Release Date

1 December 2023 – 14:50:53 UTC ()

osarch

community_hub_visible

Yes

Social Media

https://x.com/mm_paradox

Primary Genre

Adventure (25)

Store Genres

Adventure (25), Indie (23)

Steam Release Date

1 December 2023 – 14:50:49 UTC ()

Store Asset Modification Time

24 June 2024 – 09:40:57 UTC () (1719222057)

library_assets

library_capsule	en,ja,zh-cn
library_hero	en,ja,zh-cn
library_logo	en
library_header	en,ja
logo_position ↴
pinned_position	BottomLeft
width_pct	72.54760127032077
height_pct	88.15384594527927

osextended

empty string

review_score

review_percentage

Steam Deck Compatibility

Steam Deck:
Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
Some in-game text is small and may be difficult to read
This game's default graphics configuration performs well on Steam Deck
SteamOS:
This game runs successfully on SteamOS
Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
category: Playable
steamos_compatibility: Compatible
test_timestamp: 20 June 2025 – 00:00:00 UTC
tested_build_id: 12839277

configuration:

supported_input	other
requires_manual_keyboard_invoke	0
requires_non_controller_launcher_nav	0
primary_player_is_controller_slot_0	0
non_deck_display_glyphs	1
small_text	1
requires_internet_for_setup	0
requires_internet_for_singleplayer	0
recommended_runtime	proton-9.0-3RC
requires_h264	0
requires_voice_files	0
gamescope_frame_limiter_not_supported	0
hdr_support	0

Content Descriptors

Frequent Violence or Gore (2), General Mature Content (5)

controllertagwizard

Yes

First seen on SteamDB

28 October 2022 – 03:37:48 UTC (), in changelist #16520919

Content Descriptors (Including DLC)

Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

1 Languages	Interface	Full Audio	Subtitles
Japanese	Yes		Yes

Hardware Categories

Partial Controller Support

DualShock Controllers (USB Only)

DualShock Controllers

Assets

Load all asset images

clienticon

70dc5a331dd50520a240593773436521127c5d6a

clienttga

4c268ff2ef281b7ce078f191eeb0f9d2d28ec64e

icon

5dcd6e7150985bd292a7fffa851c6289714fbc09

small_capsule

english	capsule_231x87.jpg
japanese	capsule_231x87_japanese.jpg
schinese	capsule_231x87_schinese.jpg

header_image

english	header.jpg
japanese	header_japanese.jpg
schinese	header_schinese.jpg

library_assets_full

library_capsule ↴
image/english	library_600x900.jpg
image/japanese	library_600x900_japanese.jpg
image/schinese	library_600x900_schinese.jpg
image2x/english	library_600x900_2x.jpg
image2x/japanese	library_600x900_japanese_2x.jpg
image2x/schinese	library_600x900_schinese_2x.jpg
library_hero ↴
image/english	library_hero.jpg
image/japanese	library_hero_japanese.jpg
image/schinese	library_hero_schinese.jpg
image2x/english	library_hero_2x.jpg
image2x/japanese	library_hero_japanese_2x.jpg
image2x/schinese	library_hero_schinese_2x.jpg
library_logo ↴
image/english	logo.png
image2x/english	logo_2x.png
logo_position/pinned_position	BottomLeft
logo_position/width_pct	72.54760127032077
logo_position/height_pct	88.15384594527927
library_header ↴
image/english	library_header.jpg
image/japanese	library_header_japanese.jpg

Assets

main_capsule	capsule_616x353.jpg
small_capsule	capsule_231x87.jpg
header	header.jpg
hero_capsule	hero_capsule.jpg
library_capsule	library_600x900.jpg
library_capsule_2x	library_600x900_2x.jpg
library_hero	library_hero.jpg
library_hero_2x	library_hero_2x.jpg
community_icon	5dcd6e7150985bd292a7fffa851c6289714fbc09.jpg
page_background_path	app/2203040
timestamp	21 October 2024 – 04:11:12 UTC

Trailers

257012657 ↴
trailer_name	予告
trailer_category	0
trailer_480p/video/webm	257012657/movie480_vp9.webm
trailer_480p/video/mp4	257012657/movie480.mp4
trailer_max/video/webm	257012657/movie_max_vp9.webm
trailer_max/video/mp4	257012657/movie_max.mp4
microtrailer/video/webm	2203040/682091/095f262c1fc5ac00236fb4e95abbcb7c28a6bb1a/1751089421/microtrailer.webm
microtrailer/video/mp4	2203040/682091/095f262c1fc5ac00236fb4e95abbcb7c28a6bb1a/1751089421/microtrailer.mp4
screenshot_medium	257012657/movie.293x165.jpg
screenshot_full	257012657/movie_full.jpg
trailer_base_id	682091
all_ages	true
is_highlight	true
timestamp	1712038295
257011702 ↴
trailer_name	OP
trailer_category	0
trailer_480p/video/webm	257011702/movie480_vp9.webm
trailer_480p/video/mp4	257011702/movie480.mp4
trailer_max/video/webm	257011702/movie_max_vp9.webm
trailer_max/video/mp4	257011702/movie_max.mp4
microtrailer/video/webm	2203040/680467/6ee5f7c6fdcf40a75d351d45db91c8ab1edbaef5/1751089421/microtrailer.webm
microtrailer/video/mp4	2203040/680467/6ee5f7c6fdcf40a75d351d45db91c8ab1edbaef5/1751089421/microtrailer.mp4
screenshot_medium	257011702/movie.293x165.jpg
screenshot_full	257011702/movie_full.jpg
trailer_base_id	680467
all_ages	true
is_highlight	true
timestamp	1711597006

Depots

ID	Configuration	Size	DL.
2203042	Windows 64-bitJapanese	2.83 GiB	2.57 GiB

Inner depots from DLC

ID	Configuration	Size	DL.
3065951	DLC 3065950Japaneseマーダーミステリーパラドクスこのひと夏の十五年 Art Book	98.17 MiB	90.44 MiB
3065953	DLC 3065950マーダーミステリーパラドクスこのひと夏の十五年 Art Book	99.81 MiB	101.12 MiB

Total size on disk is 3.02 GiB and total download size is 2.76 GiB.

Branches

Name	Description	Build ID	Time Updated
public		12839277	30 November 2023 – 13:14:46 UTC

Other

Name	Value
baselanguages	Japanese
hasdepotsindlc	1
privatebranches	1

マーダーミステリーパラドクス このひと夏の十五年

Additional Information

Supported Languages

Tags

Categories

Hardware Categories

Assets

Depots

Inner depots from DLC

Branches

Other

マーダーミステリーパラドクスこのひと夏の十五年