Arkenfall: Opus 5.5 Builds a Zero-Asset Browser Open-World Game in 16 Hours
EricBuess · x · 2026-09-25
Developer LexnLin unveiled Arkenfall, an open-world game playable in the browser where terrain, creatures, boss fight, animations, sound and music are all code — zero assets. Opus 5.5 even cut the trailer and scored it (cover image AI-generated).
Total build: two prompts and about 16 hours. Eric Buess cited it as one of the standout Opus 5.5 game demos of the week.
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