Rim Runner
Free · play online in your browser, no download
You are the wheel: lean, balance and land clean in a precision time attack with online leaderboards and ghosts. Claude Code wrote almost all of the code, the developer says.
Official site jbtieb.itch.io, verified Nov 3, 2026. Linked as the place to play from the developer's own Reddit post on r/aigamedev.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — itch.ioitch.ioEarly access · itch.io status: In development (version 0.9.10)Free
Plays in the browser on itch.io. No download.
Browser (no download) · Desktop · Official link verified Nov 3, 2026.
About Rim Runner
Rim Runner is a 3D precision-physics time-attack racer in which you do not drive a car: you are a single wheel. You keep it upright, lean it into turns and land it on its tread, because a clean landing gives speed back and a sloppy one costs it; R restarts instantly. Ten levels run from Rolling Start, which teaches one skill at a time, to the Summit, with balance pipes, half-pipe walls, loops, lifting vents, shutters and sweepers timed to the race clock, ice, rebound walls and shortcuts, followed by The Tower, floor after floor straight up with no checkpoints, plus extra levels. Every track has an online leaderboard, and the record holder wears a crown; your personal best and the top riders race along as ghosts, and you can race or watch anyone's run. There are cups against computer riders, two-player split-screen duels and a Crown Duel mode, a map editor that uses the same parts as the levels and lets you publish tracks for others to race and rate, and cosmetic rims, treads and trails earned by playing. Version 0.9.7 added air flips. The developer, JBTieb, calls it a Trackmania-style racer and their first game, made alone in Godot 4 with Jolt physics from 27 September 2026, and says Claude Code wrote almost all of the code, about 39,000 lines with 678 automated checks, while the developer plays, judges and decides what is fun. Free in the browser, with Windows and Linux downloads, while in early access.
How it was built
Partially verifiedThe developer's post on r/aigamedev (19 Oct 2026, UTC) is titled “I built a Trackmania-style racer where you're a single wheel, in 3 weeks with Claude Opus 5.5: the trick was making the AI measure instead of guess”. It says “Claude Code wrote almost all of the code (39k lines, 678 automated checks); I play, judge and decide whats fun.” The workflow: the game keeps the developer's replays and the last seconds of every restart so Claude can compare the best run with the falls frame by frame; feel complaints become measuring tools (for example, measuring the real flight off every ramp and resizing gaps to the developer's speed); every fix gets a test; levels come from a Python generator with moving obstacles timed to the developer's pace. “What AI didn't do: decide what's fun.”
Godot 4 with the Jolt physics engine, solo, started on 27 September 2026. Claude Code (with Claude Opus 5.5, per the post title) wrote almost all of the roughly 39,000 lines of code and 678 automated checks; levels are produced by a Python generator. The developer's own replays and restart recordings are kept as data for tuning, and each fix gets a test. The synthwave soundtrack was made with Eleven Music and the tyre impact sounds with ElevenLabs, per the developer. Online leaderboards store the chosen name, times and runs as ghosts.
- Engine / framework
- Godot 4 (Jolt physics)
- Languages
- Not disclosed
- Team size
- 1 (solo)Developer ReportedReddit (u/RepublicLatter4835)
- Development time
- 3 weeksDeveloper ReportedReddit (u/RepublicLatter4835)
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Claude Code wrote almost all of the code (39k lines, 678 automated checks); I play, judge and decide whats fun.”- I built a Trackmania-style racer where you're a single wheel, in 3 weeks with Claude Opus 5.5 (r/aigamedev)
- Rim Runner devlog (itch.io)
Verification notes: AI use, code size, start date, team size, engine and the audio tools from the developer's post on r/aigamedev by u/RepublicLatter4835 (19 Oct 2026, 11:08 UTC), read from the Arctic Shift Reddit archive on 8 Nov 2026; the post links jbtieb.itch.io/rim-runner and the developer's X account @JBTiebb. Features, controls, version 0.9.10, platforms (HTML5, Windows, Linux), price and the “made by one person” line from the itch.io page; the release date from the first devlog, “Rim Runner is out: you are the wheel” (6 Oct 2026, 19:26 UTC), which also calls it the developer's first game; both read on 8 Nov 2026. The 3 weeks in the post title run from the start on 27 Sep 2026 to the post on 19 Oct 2026; the first release came on 6 Oct 2026 and updates continued after it. “Almost all” is the developer's wording; no percentage is recorded. Claude Opus 5.5 is named only in the post title and stays in the usage text. The Trackmania comparison is the developer's own; no third-party names or assets from it are used. The itch.io AI disclosure ticks AI Assisted, Code, Graphics, Sounds and Text; the post names Eleven Music and ElevenLabs for audio. The computer riders in cups are scripted bots. No rating is shown on itch.io. English interface. The game was not played.
Development history
Development starts, per the developer.
DeveloperReddit (u/RepublicLatter4835)Released free on itch.io for the browser, Windows and Linux, with 10 levels, ghosts, online leaderboards and a map editor.
Developeritch.io (JBTieb)The developer posts on r/aigamedev that Claude Code wrote almost all of the code.
DeveloperReddit (u/RepublicLatter4835)
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.
itch.io
Free in the browser, with Windows and Linux downloads at name-your-own-price; the developer says everyone who donates during early access gets the full game free when it launches. Online leaderboards keep only the name chosen in Settings, with no account.
Not publicly available: itch.io rating, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| I built a Trackmania-style racer where you're a single wheel, in 3 weeks with Claude Opus 5.5: the trick was making the AI measure instead of guess (r/aigamedev) Reddit (u/RepublicLatter4835) | Social post | Oct 19, 2026 | Nov 3, 2026 |
| Rim Runner by JBTieb itch.io | Store page | Oct 6, 2026 | Nov 3, 2026 |
| Rim Runner is out: you are the wheel itch.io (JBTieb) | Devlog | Oct 6, 2026 | Nov 3, 2026 |
| Official game page (language check) JBTieb | Official site | Not confirmed | Nov 3, 2026 |
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