Trailer for a browser open-world game with a hooded hero
50.4K views · 658 likes · 356 saves · 37 reposts · Posted Sep 23, 2026 · 3:02 · Interactive
OUR NOTEA hooded swordsman crosses a lantern-lit village square in this trailer for Arkenfall, a browser open-world game; the creator says Opus coded everything, cut the trailer and made the soundtrack.
Claude Opus 5.5 built a full open world game that runs in your browser
zero assets. terrain, creatures, boss fight, animations, sound, music. all code
it even cut this trailer and made the soundtrack (cover is image generated)
play it: https://arkenfall.siteTHE PROMPT
The creator didn't publish a prompt for this one. The post text is below.
MAKE ONE LIKE THIS
Three steps, using what the creators in this index used.- 1 · Copy the prompt
This creator didn't share a prompt. Start from our template instead.
PROMPT TEMPLATE → - 2 · Long piece? Give Claude a framework
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- 3 · Render it to MP4
For a longer piece like this one, render with a framework so the timing is exact on every take.
CLAUDE CODE + HYPERFRAMES / REMOTION →
The creator didn't name their tools. Most videos like this are HTML, canvas or SVG animation written by Claude and screen-recorded or rendered to MP4 — how that works.
Indexed Sep 28, 2026, 8:28 AM · Views as of indexing. Video and post © their creator.