Sisterly Bliss ~Don't Let Mom Find Out~

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App ID	4093400
App Type	Game
Developer	eyephon
Publisher	MangaGamer, Sunflower Ocean
Supported Systems	Windows macOS Linux
Technologies	PyGame Engine, RenPy Engine
Last Changenumber	39323160
Last Record Update	29 September 2026 – 22:49:08 UTC ()
Release Date	4 December 2025 – 04:59:43 UTC ()

❓ 84.78%

104 reviews

In-Game

A light admonishment from Mom sparks the realization that these twin sisters care for each other in more than a familial sense. In this dramatic & romantic yuri Visual Novel, it's up to you to navigate the forbidden tension between the sisters so their love can flourish without growing one-sided.

Additional Information

Developer

eyephon

ReleaseState

released

Publisher

MangaGamer

Store Release Date

4 December 2025 – 04:59:47 UTC ()

osarch

empty string

community_hub_visible

Yes

Primary Genre

Adventure (25)

Store Genres

Adventure (25), Indie (23)

Steam Release Date

4 December 2025 – 04:59:43 UTC ()

Store Asset Modification Time

3 November 2025 – 15:55:57 UTC () (1762185357)

library_assets

library_capsule	en,zh-cn
library_hero	en
library_hero_blur	en
library_logo	en,zh-cn
library_header	en,zh-cn
logo_position ↴
pinned_position	CenterCenter
width_pct	80.61699650756694
height_pct	70.89764901448586

osextended

macos64

name_localized

schinese

双生百合～要对妈妈保密哦～

review_score

review_percentage

Detected Technologies

PyGame Engine, RenPy Engine, Python SDK, SDL SDK

Steam Deck Compatibility

Steam Deck:
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
Some in-game text is small and may be difficult to read
All functionality is accessible when using the default controller configuration
This game's default graphics configuration performs well on Steam Deck
SteamOS:
This game runs successfully on SteamOS
category: Playable
steamos_compatibility: Compatible
steam_machine_compatibility: 2
test_timestamp: 28 January 2026 – 00:00:00 UTC
tested_build_id: 20283318

steam_machine_tests:

0 ↴
display	3
token	#SteamMachine_TestResult_ControllerGlyphsDoNotMatchDevice
1 ↴
display	4
token	#SteamMachine_TestResult_DefaultControllerConfigFullyFunctional
2 ↴
display	4
token	#SteamMachine_TestResult_DefaultConfigurationIsPerformant

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	native
requires_h264	0
requires_voice_files	0
gamescope_frame_limiter_not_supported	0
hdr_support	0
requires_proton_soundfonts	0

Content Descriptors

General Mature Content (5)

controllertagwizard

Yes

First seen on SteamDB

7 October 2025 – 06:27:59 UTC (), in changelist #31520199

Content Descriptors (Including DLC)

General Mature Content (5)

Supported Languages

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

Assets

Load all asset images

clienticon

ce77c8793e3f7732e93d02cf187c1cda780b9b5d

icon

3b91dd3ac3cafb673c22e65ce2c18ad1b6f39ba2

small_capsule

english	a6860a70cc98a2720178cdfee32b8c120f9513ae/capsule_231x87.jpg
schinese	766a9e037eedb62b16719723493bd089213022f8/capsule_231x87_schinese.jpg

header_image

english	a83e73d9f302e9b4b5c181a7e7c4818344851fe3/header.jpg
schinese	9a46eb1dbb40a958c27efad30a5f8c8c363f759a/header_schinese.jpg

library_assets_full

library_capsule ↴
image/english	2f682c89abfd9deb76ed17569ee748f8f7d1f077/library_capsule.jpg
image/schinese	80e55bf1f16fb364861ff81ea5e8440535139f59/library_capsule_schinese.jpg
image2x/english	2f682c89abfd9deb76ed17569ee748f8f7d1f077/library_capsule_2x.jpg
image2x/schinese	80e55bf1f16fb364861ff81ea5e8440535139f59/library_capsule_schinese_2x.jpg
library_hero ↴
image2x/english	8cb57bfc073dbdec36b160193c7e1507227137cc/library_hero_2x.jpg
image/english	8cb57bfc073dbdec36b160193c7e1507227137cc/library_hero.jpg
library_hero_blur ↴
image/english	8cb57bfc073dbdec36b160193c7e1507227137cc/library_hero_blur.jpg
library_logo ↴
image/english	a2c51cfce58ab7b3969c6b6be12b2e3e2a8507a5/logo.png
image/schinese	59e858127b53cb7fa4bc4d7117544c32c59dce95/logo_schinese.png
image2x/english	a2c51cfce58ab7b3969c6b6be12b2e3e2a8507a5/logo_2x.png
image2x/schinese	59e858127b53cb7fa4bc4d7117544c32c59dce95/logo_schinese_2x.png
logo_position/pinned_position	CenterCenter
logo_position/width_pct	80.61699650756694
logo_position/height_pct	70.89764901448586
library_header ↴
image/english	a83e73d9f302e9b4b5c181a7e7c4818344851fe3/library_header.jpg
image/schinese	9a46eb1dbb40a958c27efad30a5f8c8c363f759a/library_header_schinese.jpg
image2x/english	a83e73d9f302e9b4b5c181a7e7c4818344851fe3/library_header_2x.jpg
image2x/schinese	9a46eb1dbb40a958c27efad30a5f8c8c363f759a/library_header_schinese_2x.jpg

Assets

main_capsule	b5f1b87a5575e049d645cf46ad1ed5cebee36d38/capsule_616x353.jpg
main_capsule_2x	b5f1b87a5575e049d645cf46ad1ed5cebee36d38/capsule_616x353_2x.jpg
small_capsule	a6860a70cc98a2720178cdfee32b8c120f9513ae/capsule_231x87.jpg
small_capsule_2x	a6860a70cc98a2720178cdfee32b8c120f9513ae/capsule_231x87_2x.jpg
header	a83e73d9f302e9b4b5c181a7e7c4818344851fe3/header.jpg
header_2x	a83e73d9f302e9b4b5c181a7e7c4818344851fe3/header_2x.jpg
hero_capsule	272dad620be4ef6d285010d5f622c41efe04a489/hero_capsule.jpg
hero_capsule_2x	272dad620be4ef6d285010d5f622c41efe04a489/hero_capsule_2x.jpg
library_capsule	2f682c89abfd9deb76ed17569ee748f8f7d1f077/library_capsule.jpg
library_capsule_2x	2f682c89abfd9deb76ed17569ee748f8f7d1f077/library_capsule_2x.jpg
library_hero	8cb57bfc073dbdec36b160193c7e1507227137cc/library_hero.jpg
library_hero_2x	8cb57bfc073dbdec36b160193c7e1507227137cc/library_hero_2x.jpg
community_icon	3b91dd3ac3cafb673c22e65ce2c18ad1b6f39ba2.jpg
page_background_path	app/4093400
last_modified	17 June 2026 – 16:50:29 UTC
timestamp	17 June 2026 – 16:50:29 UTC

Trailer 1008042 ↴

trailer_name	Sisterly Bliss intro
trailer_category	0
microtrailer ↴
video/webm	4093400/146555093/0d8a046dbd35a751f7a517e02ba9b0d7aa30239b/1760703073/microtrailer.webm
video/mp4	4093400/146555093/0d8a046dbd35a751f7a517e02ba9b0d7aa30239b/1760703073/microtrailer.mp4
adaptive_trailers ↴
dash_av1	4093400/146555093/0d8a046dbd35a751f7a517e02ba9b0d7aa30239b/1760703073/dash_av1.mpd
dash_h264	4093400/146555093/0d8a046dbd35a751f7a517e02ba9b0d7aa30239b/1760703073/dash_h264.mpd
hls_h264	4093400/146555093/0d8a046dbd35a751f7a517e02ba9b0d7aa30239b/1760703073/hls_264_master.m3u8
screenshot_medium	257219234/27ef3171d1b4ee7e2517ce8862cdef70b6d678fb/movie_600x337.jpg
screenshot_full	257219234/27ef3171d1b4ee7e2517ce8862cdef70b6d678fb/movie_full.jpg
all_ages	true
is_highlight	true
timestamp	4 December 2025 – 04:59:44 UTC

Builds

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Sisterly Bliss ~Don't Let Mom Find Out~

Additional Information

Supported Languages

Tags

Categories

Assets

Trailer 1008042 ↴

Builds