Claude Opus 5 recreates Fallout in one 2.3 MB HTML file
chrisfirst · x · 2026-07-28
A user says Claude Opus 5, prompted to recreate Fallout in one HTML file, produced a fully explorable world with unique landmarks, a functional Pip-Boy, dialogue trees, and even work in progress on a vault.
The post highlights that the file is only 2.3 MB, and the quoted follow-up points out a reactive world state: characters change dialogue based on what the player has done in the world.
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