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96% positive of 462 · Very Positive · Live from Steam
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Free on Steam. The demo has its own app, so its players are counted separately.
Mysterious phenomena from space. A researcher's fatal accident. Cryptic codes engraved on an unknown material. Together with your brilliant sister-in-law, you must unravel a mystery that could determine the fate of Earth. A sci-fi mystery visual novel of discovery and suspense.
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What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 96% on 2026-11-02 → 96% today (462 reviews)
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Works, but may need extra effort. Results from Valve's own testing.
Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.
This version includes the following changes: - Fixed typos and text errors in the Japanese and Korean versions.
Fixed an issue where some text remained in Japanese in the Chinese and Korean DLCs.
When playing in Chinese or Korean, we have discovered that save data is not compatible between Version 1.1 and Version 1.2. To address this, we have opened a beta branch that allows you to temporarily play Version 1.1. By accessing Version 1.1 through the beta…
Fix the issue that the ending cut scene is not shown correclty in specific environments including SteamDeck.
Some of the puzzles have been adjusted. (These changes apply to the Japanese version only.)Starting with this version, the in-game language selection feature has been removed. To play in a language other than Japanese, please change your Steam language setting…
We added a new language support - Korean! Please, have a fun! We are still seeking a partner for English support.
Supports Japanese, Korean, and Simplified Chinese.The second DLC for Stellar Code, the official artbook, has now been released!This artbook features behind-the-scenes details about the characters that were not revealed in the main story, as well as early conce…
Sorry, the English version has not been prepared yetːsteamsadːThe PDF version of the booklet distributed at Comic Market 107 is now available on Steam as a DLC.It takes approximately 30–40 minutes to read, and the content is equivalent to the physical booklet.…
Even when Japanese is selected in the language settings, Simplified Chinese and Korean can now also be chosen from Config.Fixed an issue where Auto mode and Skip mode would stop during certain scenes.Corrected typos, misspellings, and furigana.
Community items have been added to "Title"! You can now get badges, trading cards, profile backgrounds, and more—come take a look!
You are about to unravel an unbelievable mystery.While this is a mystery-themed visual novel, it differs from conventional mysteries — there are no culprits to catch or tricks to deduce.The mystery you must solve is one rooted in the cosmos and theoretical phy…
2 items on Steam, newest first.
