VybeCiv
Free · play online in your browser, no download
A civ-style 4X where reaching space ends act one: Earth becomes one hex of the Solar System, and the Solar System one hex of the Galaxy.
Official site vaigames.com, verified Nov 3, 2026. Linked from the developer's own Reddit post and from the developer's itch.io page and devlog; the page credits @AlbertSimondev.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleased · First public buildFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
- Play free — itch.ioitch.ioReleased · itch.io page that links to the browser version on vaigames.comFree
Plays in the browser on itch.io. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About VybeCiv
A free, single-player, turn-based 4X strategy game in the browser. It starts like a classic civ game: you found cities on Earth, research, build units and deal with AI rivals. When you reach orbit, the whole planet collapses into one hex on a Solar System map where planets and moons are the new land, and later the Sun's system becomes one tile of the Galaxy, with the same verbs on bigger maps. Older maps keep producing under a governor while you play the new tier, feed the map above it, and can be revisited at any time. There is a Daily World that is the same for everyone that day, and saves stay in the browser, with export and import of save files. The developer, Albert Simon, says Claude Code wrote most of the code from the developer's design specs while the developer reviewed and playtested every change; the design and balance are the developer's own, and the music was made with Suno. Rendering uses PixiJS on a static site with no backend or account. The developer calls it a first public build with rough onboarding and a weak late-game AI.
How it was built
Partially verifiedIn a post on r/vibecoding (6 Oct 2026, UTC) titled “vibe-coded a free space civ 4X … (Claude Code, PixiJS)”, the developer writes: “Claude Code wrote most of the code from my design specs. I reviewed and playtested every change.” Lessons from the post: short, specific specs beat big prompts, and giving Claude Code one system at a time with clear rules caused far fewer regressions than asking for whole features; AI writes code fast but cannot tell whether the game is fun, so balance and pacing came from playtesting; and agreeing on the data structure early saved rewrites when three map tiers shared one save. Music is by Suno.
- Developeritch.io devlog (19 Oct 2026): “I'm a solo developer. Most of the code was written with Claude Code from specs I wrote, and I reviewed and playtested every change. The design and balance are mine.” It ends: “Made with AI help: Claude Code, Grok Bot, Suno, fal.ai.” — itch.io (albertsimon)
Spec-driven solo development: the developer writes design specs, Claude Code implements one system at a time, and the developer reviews and playtests each change. A static site rendered with PixiJS, with no backend, account or download; games save in the browser, with save export and import added because a long 4X run is a lot to lose. Per the developer, the hardest parts were making the jump between the three map tiers read clearly while all three follow the same turn, and saving all of it in the browser. Music made with Suno; the devlog also lists Grok Bot and fal.ai among the AI tools used, without saying for what.
- Engine / framework
- PixiJS
- Languages
- JavaScript
- Team size
- 1 (solo)Developer Reporteditch.io (albertsimon)
- Initial build time
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Claude Code wrote most of the code from my design specs. I reviewed and playtested every change.”- vibe-coded a free space civ 4X where reaching space ends act one (r/vibecoding)
- Making a 4X where the map keeps getting bigger (itch.io devlog)
Verification notes: AI use from the developer's post by u/albertsimondev on r/vibecoding (6 Oct 2026, 06:11 UTC; no replies), read from the Arctic Shift Reddit archive on 8 Nov 2026, and from the developer's itch.io devlog (19 Oct 2026, 07:35 UTC). Both say Claude Code wrote most of the code; no share is given, so none is recorded. The release date is the Reddit post, which calls it the first public build; the itch.io page shows no publish date (updated 4 Nov 2026, status Released, AI disclosure: AI Assisted, Code, Graphics, Sounds, Text). Developer: the same Albert Simon (@AlbertSimondev) who made VybeNomad and AIRIS; the play page says “made by @AlbertSimondev”, and the devlog says “I'm a solo developer”. The rivals are conventional game AI written as part of the game; the site's content security policy allows connections only to its own origin and Cloudflare's analytics, so no AI service is called during play (checked 8 Nov 2026). JavaScript is assumed from the web build. English only as observed. The game was not played.
Development history
First public build shared on r/vibecoding; the developer says Claude Code wrote most of the code from the developer's specs.
DeveloperReddit (u/albertsimondev)Devlog on itch.io explains the nested Earth, Solar System and Galaxy maps and how the game was made.
Developeritch.io (albertsimon)
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.
Browser (official site)
Free in the browser with no account or install; saves stay in the browser and can be exported to a file.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
itch.io
Free; the page sends players to the browser version on vaigames.com.
No public metrics recorded for this listing.
Not publicly available: itch.io rating, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| vibe-coded a free space civ 4X where reaching space ends act one instead of the game (Claude Code, PixiJS) (r/vibecoding) Reddit (u/albertsimondev) | Social post | Oct 6, 2026 | Nov 3, 2026 |
| Making a 4X where the map keeps getting bigger itch.io (albertsimon) | Devlog | Oct 19, 2026 | Nov 3, 2026 |
| VybeCiv by albertsimon itch.io | Store page | Not confirmed | Nov 3, 2026 |
| VybeCiv — Free 4X Strategy Game in Your Browser Albert Simon (vaigames.com) | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Albert Simon (vaigames.com) | Official site | Not confirmed | Nov 3, 2026 |
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