流転のジェミニ
A turn-based dark fantasy RPG in the afterworld, with code written by Claude Code.
Links go to the official store or developer page. Last verified Nov 3, 2026.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- View demo on SteamSteamDemo · Free demo (Windows, Japanese only for now) since 10 Jun 2026; full game planned for August 2027 on Windows and macOS, price not announcedFree
Download through the Steam app. A free Steam account is required.
Desktop · Steam
- View demo on BrowserBrowserDemo · Short demo without combat; may not run on smartphones (per the unityroom page)Free
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About 流転のジェミニ
A turn-based dark fantasy RPG set in an afterworld, where you live with a same-sex partner and your choices lead to one of four endings. The developer, kanae, says in a note.com devlog that Claude Code wrote and fixed much of the code, while Claude helped translate the scenario files and draft the English store text; the Steam AI disclosure says the developer wrote the story and reviews all AI-assisted output. A free short demo is on Steam (Windows) and in the browser on unityroom. The full game is planned for August 2027 on Steam, published under the name Salmon Dance (サーモンダンス).
Screenshots and art
流転のジェミニ key art · Steam store artwork
How it was built
VerifiedThe developer says (in Japanese) that Claude Code handled code implementation, fixed the tilemap auto-placement tool, built a tool that generates Unity images and Rule Tiles from autotile assets, converted the demo scenario into 14 CSV files with the needed event commands, investigated and fixed bugs, researched WebGL issues and reworked the system for English support.
- DeveloperSteam AI disclosure lists drafting source code among the AI uses, reviewed by the developer; no content is generated during gameplay. — Steam
Drafted map layouts as HTML and converted them to CSV for the tilemap auto-placement tool, helped translate and polish the 17 scenario CSV files into English, and helped with the English store description and Steam submission steps (per the devlog).
Solo development in Unity: the developer writes the story, draws the art and decides scope, and hands code, bug fixing and repetitive data work to Claude Code. The Steam disclosure also lists AI help with some visual assets, some music and the English localization.
- Engine / framework
- Unity
- Languages
- Not disclosed
- Team size
- 1 (solo)Developer Reportednote.com (よもがみ/kanae)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
Verification notes: AI tools from the developer's devlog and the Steam AI disclosure; release plan (Windows and macOS), languages and demo date from the Steam store pages; browser demo link from the official site.
Development history
Short demo (no combat) published on unityroom as a WebGL build.
Demo shown at the online indie game event EARLY TAKES.
Developernote.com (よもがみ/kanae)Steam store page passes review and goes public.
Developernote.com (よもがみ/kanae)Free Windows demo released on Steam (the demo page says the demo is Japanese only for now).
OfficialSteam- August 2027
Planned full release on Steam.
OfficialSteam
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Steam
Applies to the demo (Steam app 4782510). The full game's price is not listed on Steam.
Not publicly available: Concurrent players, Steam reviews, Positive Steam reviews, Estimated owners, Gross revenue.
Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Reviews & rankings
Not yet reviewed by our editors.
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Not currently ranked.
No player reviews yet.
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| 流転のジェミニ on Steam Steam | Store page | Not confirmed | Nov 3, 2026 |
| 流転のジェミニ Demo on Steam Steam | Store page | Jun 10, 2026 | Nov 3, 2026 |
| Claudeを使い倒しながらマップを作りながらSteamへ登録しながらイベントまでにデモ版を完成させた話【AI駆動ゲーム開発記#3】 note.com (よもがみ/kanae) · Japanese | Devlog | Jul 23, 2026 | Nov 3, 2026 |
| 流転のジェミニ — official site サーモンダンス · Japanese | Official site | Not confirmed | Nov 3, 2026 |
| 流転のジェミニ_ショートデモ unityroom · Japanese | Store page | May 21, 2026 | Nov 3, 2026 |
