REGOLITH — The Silence at Anaxagoras
Free · play online in your browser, no download
Drive a six-wheel survey rover across a lunar crater whose regolith keeps every rut you cut. The developer says 95% of the game came out of one prompt to Claude Code.
Official site winchxyz.github.io, verified Nov 3, 2026. Play link in the repository README, which the developer links in their own Reddit post on r/ClaudeCode.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
- View on GitHubGitHubReleased · Source code (plain ES modules, vendored three.js r160), MIT licenceFree
Download from the GitHub releases page.
Desktop · Official link verified Nov 3, 2026.
About REGOLITH — The Silence at Anaxagoras
REGOLITH — The Silence at Anaxagoras is a free 3D lunar rover survey game for the browser. Two hundred and fourteen days ago the far-side outpost Beacon-9 sent four seconds of empty carrier and stopped; you operate MU-7 CASSIOPEIA, a 900 kg six-wheel rover set down on the floor of the crater Anaxagoras at 73° north, to survey the basin, restore the relay chain and find out what is under the floor. You drive under one-sixth gravity with spring-damper suspension and slip-based tyres, sweep the ground with a ground-penetrating radar that finds buried objects at real depths, aim a two-link sampling arm and drill cores out of the same height field the wheels drive on, deploy relay beacons and a solar array, and watch the battery, which only charges with the sun actually on the panel. The wheels cut ruts and berms into the terrain, a spinning wheel digs itself a hole, and dust flies in clean parabolas because there is no air. There is a five-mission campaign with an ending and a free survey mode, twelve codex entries and nine sample types; two optional settings swap the arcade handling for a slower LRV profile and add the 2.6-second Earth round-trip signal delay. Every texture, rock, star and sound is generated by code at load time, so the repository holds no asset files. The developer, posting as u/oxmannnn, says 95% of the game came out of a single prompt to Claude Code (Opus 5 on Ultracode), followed by sixteen rounds of fixes. It runs in desktop browsers and on phones and tablets with twin thumbsticks, needs WebGL2, autosaves in the browser, and the code is MIT-licensed on GitHub.
How it was built
Partially verifiedIn a post on r/ClaudeCode (11 Aug 2026, UTC) the developer writes that the physics, renderer, terrain, lore, sound design and interface — “95% came out of a single prompt to Claude Code (Opus 5 on Ultracode)”, and quotes the prompt: “Create me a fully playable release-ready game. On GPU. Game about moon discovery with rover with gravity, moon sand and etc.. I need it in 3D and not a voxel game. Make it with maximum effort, show me best what you can create. Use all your power, knowledge and make best graphics and best game design. Surprise me with graphics, lore and everything.” In replies the developer says it took about 3.2M tokens, around 5 hours of work and four usage windows on a Max x20 subscription, with Opus 5 only and no sub-agents, and that the first build did not arrive working: steering was inverted, the suspension was sized for Earth gravity and menus were broken, which took sixteen rounds of fixes recorded in the commit history.
- DeveloperREADME: “This is a toy. It started as a single prompt”; “That got a playable build. Everything after it came from sixteen rounds of ‘this bit is wrong, fix it’”. — GitHub (winchxyz)
- ObservedAll 19 commits (11 to 17 Aug 2026, by “winch”, full history fetched on 8 Nov 2026) carry a “Co-Authored-By: Claude Opus 5” trailer. — GitHub (winchxyz)
Plain ES modules with a vendored copy of three.js r160 in one WebGL2 context, with no engine, no build step and no npm dependencies; about 6,300 lines of JavaScript and 590 of CSS, roughly 380 KB gzipped. The terrain is a nine-level geometry clipmap sampling a height field baked once on the CPU, and the GPU and the wheel physics read the same field, so ruts and drill pits cut by the rover are real geometry. The surface uses a Lommel–Seeliger photometric model with an opposition surge, shadows come from a baked sun-occlusion mask, and a performance governor caps the framebuffer by total pixel count. Every texture, the Earth and lunar albedo, the boulders and the stars are generated at load time, and all sound is synthesised with WebAudio; per the README the game fetches nothing at runtime. A CLAUDE.md file in the repository records what the code knows for later sessions. The game calls no AI services.
- Engine / framework
- Three.js
- Languages
- JavaScript
- Team size
- Not disclosed
- Initial build time
- About 5 hours of Claude Code work for the first build (about 3.2M tokens)Developer ReportedReddit (u/oxmannnn)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“95% came out of a single prompt to Claude Code (Opus 5 on Ultracode)”Verification notes: AI use from the developer's post by u/oxmannnn on r/ClaudeCode (11 Aug 2026, 22:26 UTC) and the developer's replies (11 to 18 Aug 2026), read from the Arctic Shift Reddit archive on 8 Nov 2026; the post links the repository. Story, features, controls, browser requirements, technical details and licence (MIT; vendored three.js MIT) from the README read through raw.githubusercontent.com, and the commit history from a clone of the public repository, on 8 Nov 2026: 19 commits by “winch” between 11 Aug 2026, 14:13 UTC and 17 Aug 2026, all with a “Co-Authored-By: Claude Opus 5” trailer. Same developer as CELADON — The Long Ash (same Reddit account u/oxmannnn and GitHub account winchxyz); the developer object is reused. “95% came out of a single prompt” describes how much of the game the first prompt produced, not a measured share of AI-written code, so no AI code share is recorded. “Ultracode” is the developer's wording; here the developer names Claude Code, so the tool is Claude Code. A reply on 12 Aug 2026 says the developer added a “realistic mode” that day (the LRV drive profile in the README). The developer calls it “a showcase of what can be done with AI” and the README calls it “a toy” that is “not a finished game”, with a beginning, five missions and an ending. The post had a score of 451 on Arctic Shift (observed; not a metric). The game was not played.
Development history
First commit and GitHub Pages release; the developer posts it on r/ClaudeCode, saying 95% came out of one prompt to Claude Code.
The developer adds a realistic driving mode, per a reply under the post.
DeveloperReddit (u/oxmannnn)Latest commit in the repository as fetched on 8 Nov 2026.
ObservedGitHub (winchxyz)
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 nothing to install; needs WebGL2 and import maps (Chrome/Edge 89+, Firefox 108+, Safari and iOS 16.4+). Works on phones and tablets with on-screen thumbsticks; progress autosaves to the browser every 20 seconds.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
GitHub
Free; runs locally with the zero-dependency Node server in the repository.
No public metrics recorded for this listing.
Not publicly available: GitHub stars.
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 |
|---|---|---|---|
| I created a 3D lunar rover survey game with Opus 5. (r/ClaudeCode) Reddit (u/oxmannnn) | Social post | Aug 11, 2026 | Nov 3, 2026 |
| winchxyz/moon-rover README GitHub (winchxyz) | Repository | Not confirmed | Nov 3, 2026 |
| winchxyz/moon-rover commit history GitHub (winchxyz) | Repository | Aug 11, 2026 | Nov 3, 2026 |
| REGOLITH — The Silence at Anaxagoras winchxyz.github.io | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) winchxyz | Official site | Not confirmed | Nov 3, 2026 |
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