Sister Compass Is Out on Steam With a 10% Launch Discount

Sister Compass: Slow Life Loving with My Sisters on a Deserted Island is now available on Steam. Developed by Twinkle STARs and published globally by akaeroCore, the island-management simulation launches with support for five interface and subtitle languages.

Its story follows an older brother injured after working a dangerous job. Al and Miu respond with an unusual plan: move together to a deserted island where he can recover while the three begin a new life.

Quick Summary

• Global title: Sister Compass: Slow Life Loving with My Sisters on a Deserted Island
• Japanese title: シスターズコンパス ～ 妹たちと無人島でのほほんスローライフ～
• Developer: Twinkle STARs
• Publisher: akaeroCore
• Official Steam genres: Casual / Simulation
• Format: single-player
• Platform: PC / Windows
• Store: Steam
• Steam App ID: 4583960
• Status: released
• Steam storefront date: October 7, 2026
• akaeroCore release announcement: October 8, 2026
• SteamDB release state: released
• SteamDB unlock record: October 8, 2026 at 04:12 UTC
• Regular Steam price shown: US$8.99
• Launch-sale price: US$8.09
• Launch discount: 10%
• Launch sale ends: October 21, 2026
• Setting: deserted island and surrounding archipelago
• Player character: older brother
• Story trigger: protagonist is injured after working a dangerous job
• Al and Miu's plan: move to a deserted island to help their brother recover
• Main character: Al / Alhena Lumiere
• Main character: Miu / Miu Lumiere
• Al: three years younger than the protagonist
• Al: cheerful, proactive and skilled at housework
• Miu: five years younger than the protagonist
• Miu: intelligent, mysterious and physically frail
• Core gameplay: island management
• Activity: farming / ranch management
• Activity: fishing
• Activity: gathering
• Activity: exploration
• Activity: collecting various resources
• Activity: expanding the base camp
• Activity: exploring new islands
• Activity: deepening bonds with Al and Miu
• Activity: finding and collecting outfits
• Time limits: none
• Daily structure: freely planned by the player
• Environment: changes with the seasons
• Player nickname: customizable
• Examples: Onii-chan / Onii-sama or another preferred name
• Interface language: English
• Interface language: Japanese
• Interface language: Simplified Chinese
• Interface language: Traditional Chinese
• Interface language: Korean
• Subtitles: supported in the same five languages
• Full audio: not marked in Steam's language table
• Steam Cloud: supported
• Family Sharing: supported
• Steam Deck compatibility: no official compatibility result yet
• Minimum OS: Windows 10 64-bit
• Minimum CPU: Intel Core i3-4340
• Minimum RAM: 8 GB
• Minimum storage: 5 GB
• Steam gameplay trailer: available
• Official key art: available
• Steam gameplay screenshots: available

Steam, Key Art and Gameplay

Steam Release Comes With a Launch Discount

Steam currently lists a regular price of US$8.99, reduced to US$8.09 during a 10% launch promotion running through October 21.

The storefront displays October 7 as its release date, while akaeroCore announced the launch on October 8. SteamDB likewise records the product entering its released state on October 8 UTC.

A Slow Life With No Time Limits

Sister Compass does not force players to complete its objectives against strict daily timers. Goals exist, but each day can be spent farming, fishing, gathering resources, exploring or simply spending time with the characters.

Island progression revolves around developing the farm and base camp, collecting resources and eventually venturing toward additional islands.

Al and Miu Are at the Center of Island Life

Al is described as a cheerful younger sister with a talent for household work. She enjoys helping her brother while keeping some of her deeper emotional dependence to herself.

Miu is younger and has lower stamina, but she is the one who plans the island relocation together with Al. Both accompany the player throughout the new life on the island.

Five Languages Support the Global Release

Steam provides interface and subtitle support in Japanese, English, Simplified Chinese, Traditional Chinese and Korean.

The current minimum PC specifications list Windows 10 64-bit, an Intel Core i3-4340, 8 GB of RAM and 5 GB of available storage.

Why This Matters

1) The simulation is not built around time pressure

Objectives exist, but players are free to approach daily activities without countdowns or strict deadlines.

2) Farming and exploration work together

The game extends beyond ranch management through resource gathering, fishing, base expansion and journeys to additional islands.

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3) Steam broadens language accessibility

The release includes interface and subtitle support across five languages, including English, Japanese, Chinese and Korean.

Sister Compass Game Information

For now, the additional important information currently known includes:

• Sister Compass is developed by Twinkle STARs
• akaeroCore publishes the Steam version
• the game is categorized as a casual simulation
• its main concept is an island-management simulation
• it is designed for one player
• Steam currently lists Windows only
• the Steam App ID is 4583960
• its current Steam state is released
• the storefront displays October 7, 2026
• akaeroCore announced the release on October 8, 2026
• SteamDB records the Steam Release Date as October 8, 2026 at 04:12 UTC
• the date difference comes from store-date metadata and the separate unlock timestamp
• the active launch discount is 10%
• the displayed regular price is US$8.99
• the displayed sale price is US$8.09
• the launch promotion ends October 21, 2026
• Steam provides a gameplay trailer
• Steam also provides a collection of gameplay screenshots
• the game has official key art
• the player character previously worked a dangerous job
• the protagonist is injured in an accident
• Al and Miu then plan a move to a deserted island
• island life is intended to help their brother recover
• Al's full name is Alhena Lumiere
• Al is three years younger than the protagonist
• Al has a cheerful and proactive personality
• Al is skilled at household work
• Al enjoys taking care of her brother
• Miu's full name is Miu Lumiere
• Miu is five years younger than the protagonist
• Miu is described as intelligent and somewhat mysterious
• Miu has relatively low stamina
• Miu is one of the people behind the island relocation plan
• players can customize how the sisters address the protagonist
• Onii-chan and Onii-sama are two examples provided by the store
• fishing is one of the primary activities
• resource gathering is part of exploration
• farming and ranch management support island development
• the base camp can be expanded
• additional islands can be explored
• scenery changes with the seasons
• objectives do not have time limits
• players decide how to spend each day
• different outfits can be found for the characters
• English interface and subtitles are supported
• Japanese interface and subtitles are supported
• Simplified Chinese interface and subtitles are supported
• Traditional Chinese interface and subtitles are supported
• Korean interface and subtitles are supported
• Steam does not mark full-audio support for those five languages
• Steam Cloud is listed as a feature
• Family Sharing is listed as a feature
• Steam Deck compatibility remains unknown
• the minimum OS is Windows 10
• a 64-bit operating system is required
• the minimum processor is Intel Core i3-4340
• the minimum memory requirement is 8 GB RAM
• the minimum storage requirement is 5 GB
• Steam metadata also contains a separate demo app
• the demo uses App ID 4766930
• SteamDB records the demo as released on June 15, 2026
• game information is available through Steam
• developer information is available through Twinkle STARs
• the publisher's product page is available through akaeroCore
• developer updates are available through Twinkle STARs Official X
• publisher updates are available through akaeroCore Official X

Closing

Sister Compass is now available to Steam players, combining farming, exploration, resource gathering and relaxed island life with Al and Miu without imposing strict time pressure.

The 10% launch discount remains active through October 21. Steam currently lists Windows as its only platform, while Steam Deck compatibility has yet to receive an official result.