Image: u/oxmannnn on Reddit · The Tria Prima title screen over a dark island landscape
Tria Prima, a dark-fantasy alchemy game from one prompt
From a single prompt, Claude Code spent about four hours building a first-person 3D alchemy adventure in which every model, texture and sound is generated in code; the only asset files are two fonts.
Credits
Earliest dated source:
The full story
Tria Prima is a first-person dark-fantasy alchemy game that runs in a browser tab. The player lands on a dying island, gathers plants, brews potions in a ruined chapel and uses them on the world: fire burns briars, cold freezes water to cross, one potion blasts a rockfall, and fire kills the shades in the Gloom. Brewing is a triangle of Sulfur, Mercury and Salt, kept in balance with bellows and a damper.
It came from one prompt to Claude Code with Fable 5.2 on maximum effort; the only other input was a style note, where to publish it and one bug report. There are no model, texture or sound files: trees, rocks, the chapel, music and footsteps are all generated in code when the page loads, and the soundtrack is notes in a text file played by synth instruments. Claude also wrote a tool to play the game from a script and record the trailer.
The run used 5.4 million output tokens and about 6.5 hours including fixes for three bugs in the first build. It takes about an hour to finish and needs a keyboard, mouse and GPU.
How it was done
Tools
Themes
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: One prompt. Dark-fantasy alchemy game in a browser tab. No asset files except two fonts.Reddit poster: oxmannnnPosted
The maker's post in r/vibecoding, including the full prompt.