Marshmallow Imouto Succubus

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App ID	2243980
App Type	Game
Developer	Orcsoft
Publisher	Sekai Project
Supported Systems	Windows
Technologies	KiriKiri Engine
Last Changenumber	31542944
Last Record Update	8 October 2025 – 07:21:48 UTC ()
Release Date	22 September 2023 – 18:55:19 UTC ()

❓ 66.33%

18 reviews

In-Game

Tsukikawa Keisuke had a strange dream. That dream involved his younger sister but instead of her usual, innocent self, she had lust in her eyes. So he finds out that a succubus lurks within her! How will he choose between his innocent sister and the allure of a lustful succubus?!

Additional Information

Developer

Orcsoft

ReleaseState

released

Publisher

Sekai Project

Store Release Date

22 September 2023 – 18:55:22 UTC ()

osarch

empty string

community_hub_visible

Yes

Primary Genre

Adventure (25)

Store Genres

Adventure (25), Casual (4)

Steam Release Date

22 September 2023 – 18:55:19 UTC ()

Store Asset Modification Time

22 September 2023 – 05:34:53 UTC () (1695360893)

library_assets

library_capsule	en,zh-cn,ja
library_hero	en
library_logo	en,ja,zh-cn
logo_position ↴
pinned_position	BottomLeft
width_pct	50
height_pct	50

osextended

empty string

name_localized

japanese	ましゅまろ☆いもうと☆さっきゅばす☆
schinese	棉花糖☆妹妹☆魅魔

review_score

review_percentage

Detected Technologies (?)

KiriKiri Engine, Vorbis SDK

Steam Deck Compatibility

Steam Deck:
Valve is still working on adding support for this game on Steam Deck
SteamOS:
Valve is still working on adding support for this game on SteamOS
category: Unsupported
steamos_compatibility: Unsupported
test_timestamp: 12 October 2023 – 00:00:00 UTC
tested_build_id: 12263374

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	0
small_text	0
requires_internet_for_setup	0
requires_internet_for_singleplayer	0
recommended_runtime	proton-8.0-4
requires_h264	0
requires_voice_files	0
gamescope_frame_limiter_not_supported	0
hdr_support	0

Content Descriptors

Some Nudity or Sexual Content (1), General Mature Content (5)

First seen on SteamDB

6 December 2022 – 02:37:59 UTC (), in changelist #16973868

Content Descriptors (Including DLC)

Some Nudity or Sexual Content (1), General Mature Content (5)

Supported Languages

3 Languages	Interface	Full Audio	Subtitles
English	Yes		Yes
Japanese	Yes	Yes	Yes
Simplified Chinese	Yes		Yes

Assets

Load all asset images

clienticon

22e3d409764c8b5a6e64c3b2a221a898e53643cb

clienttga

39f846a938aa3e62b264349b1e3c96127e177c73

icon

1f76ef444f068a0e6512dd3d307e496f085ebd82

small_capsule

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

header_image

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

library_assets_full

library_capsule ↴
image/english	library_600x900.jpg
image/schinese	library_600x900_schinese.jpg
image/japanese	library_600x900_japanese.jpg
image2x/english	library_600x900_2x.jpg
image2x/schinese	library_600x900_schinese_2x.jpg
image2x/japanese	library_600x900_japanese_2x.jpg
library_hero ↴
image/english	library_hero.jpg
image2x/english	library_hero_2x.jpg
library_logo ↴
image/english	logo.png
image/japanese	logo_japanese.png
image/schinese	logo_schinese.png
logo_position/pinned_position	BottomLeft
logo_position/width_pct	50
logo_position/height_pct	50

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	1f76ef444f068a0e6512dd3d307e496f085ebd82.jpg
page_background_path	app/2243980
timestamp	11 October 2024 – 03:14:54 UTC

Trailer 600571 ↴

trailer_name	Teaser Trailer
trailer_category	0
trailer_480p ↴
video/webm	256965636/movie480_vp9.webm
video/mp4	256965636/movie480.mp4
trailer_max ↴
video/webm	256965636/movie_max_vp9.webm
video/mp4	256965636/movie_max.mp4
microtrailer ↴
video/webm	2243980/600571/23ac0b76b052cccae2d83cb5351212a930d954e2/1751527706/microtrailer.webm
video/mp4	2243980/600571/23ac0b76b052cccae2d83cb5351212a930d954e2/1751527706/microtrailer.mp4
adaptive_trailers ↴
dash_av1	2243980/600571/23ac0b76b052cccae2d83cb5351212a930d954e2/1751527706/dash_av1.mpd
dash_h264	2243980/600571/23ac0b76b052cccae2d83cb5351212a930d954e2/1751527706/dash_h264.mpd
hls_h264	2243980/600571/23ac0b76b052cccae2d83cb5351212a930d954e2/1751527706/hls_264_master.m3u8
screenshot_medium	256965636/movie.293x165.jpg
screenshot_full	256965636/movie_full.jpg
all_ages	true
is_highlight	true
timestamp	9 September 2023 – 01:14:52 UTC

Steam charts

Compare

0 players right now
1 24-hour peak
5 all-time peak 27 September 2023

SteamDB.info

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Store data

Owner estimations

~540 by VG Insights
~715 by Gamalytic

Monthly players breakdown

Initializing Steam charts…

Steam hub followers history

Initializing followers chart…

User reviews history

❓ Mostly Positive
66.33% SteamDB Rating
14 77.8% positive reviews
4 22.2% negative reviews

How many players are playing Marshmallow Imouto Succubus right now on Steam?

Steam player counter indicates there are currently 0 players live playing Marshmallow Imouto Succubus on Steam.

Marshmallow Imouto Succubus had an all-time peak of 5 concurrent players on 27 September 2023.

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Marshmallow Imouto Succubus

Additional Information

Supported Languages

Tags

Categories

Assets

Trailer 600571 ↴

Steam charts

Store data

Owner estimations

Monthly players breakdown

Steam hub followers history

User reviews history