13 games made with Claude Opus 5.5 you can play in your browser
Claude Opus 5.5 is Anthropic's coding model, and one of the first things people did with it was hand it a long brief in Claude Code and publish whatever came back as a browser game. This page lists the 13 such games on Floating Arcade. Every one of them is playable here, from a copy we keep, with no sign-up.
A word on what "made with Claude Opus 5.5" means. For all but 2 of these, the author or the game's own repository says so — usually in the README, sometimes with the prompt they used. That is a claim by the person who made it. We can read a README and check the commit history; we cannot watch the game being made. Each game's page says exactly whose word the credit is and what we looked at.
Credited by the author or the repository (11)
- 终焉防火墙 · LAST FIREWALL — A pixel-art survival bullet-hell shooter: steer with the mouse, the gun aims itself, and bosses arrive from 2:30.
- Kâğıt Kart — A kart racer inside a pop-up book, with every mesh, texture and sound made by code.
- Sprout Quest — A cute top-down action RPG: fight monsters in small arenas, craft gear and rebuild a village.
- NOVA LANCER — A three-minute 3D rail shooter over a sunset ocean, a red canyon and a neon fortress, ending on a sea-dragon boss.
- 万物皆可滚 · Roll Everything — An unofficial Katamari Damacy-style 3D roll-and-grow game: push a five-colour stone from a melon seed up to whole mountains.
- Merge to the Moon (月餅合成) — A pixel-art, Suika-style merge game: drop sesame seeds and mooncakes, merge them up to the moon.
- Turbo Kart Rally — A Mario Kart-style kart racer in three.js: eight racers, one coastal circuit, drifting and items.
- Palmera Bay — A free-roam sunset drive in a fast convertible through a neon-lit tropical coastal city.
- Crab Dash — A one-button rhythm platformer starring a crab: six levels, a level editor, and a README that credits Claude Opus 5.5.
- Fall Line — Freeride Mountain — A freeride snowboard and ski game on one big procedural mountain, credited to Claude Opus 5.5.
- A Day on the Coral Reef — A pixel-art reef that lives through dawn, day, dusk and night in twenty seconds.
Listed on someone else's word (2)
These carry the tag because of a forum post or because this site's editor was told so, not because the game's own page says it. We list them for completeness and say so on each page:
- Voxel Musou — Zhao Yun — An unofficial Dynasty Warriors-style spear fighter in voxels: one hero against a Wei army.
- 飞车 3D · Feiche 3D — Unofficial QQ Speed fan recreation: four tracks, drift charging, item races.
What they have in common
8 of the 13 are 3D, 4 publish their source under an open licence, and 4 are tagged as fan remakes. Several more are modelled on well-known games — a Mario Kart-style racer, a Star Fox-style rail shooter, a Geometry Dash-style platformer — and each page says how closely. 10 sit on GitHub Pages. 10 work on a phone; 3 need a keyboard and a desktop, as their pages say.
Are these really one-prompt games?
Several READMEs say the game came from a single brief, and some publish the brief. Take that as the author's description of how it went, not as a benchmark: nobody here ran the same prompt twice, so a game's polish tells you little about the model that made it. Play them and judge the result.
For how this collection compares with the games made with OpenAI's model, see Claude Opus 5.5 vs GPT-6 Astra: what the games here actually show. The full list, with filters, is on the Made with Claude Opus 5.5 page.