# Space exploration game made using Claude Opus 5

> Source: <https://twitter.com/anshuc/status/2081801966158811506>
> Published: 2026-07-28 05:38:34+00:00

I ran Claude Opus 5 in one marathon session for 24 hours straight, and ended up with this game.
No external assets or code. Every pixel and sound was built by Claude.
Prompts, workflow, code, and link below.
(sound on!)

- Play it yourself:
[longsilence.anshu.dev](https://longsilence.anshu.dev)Code:[github.com/achimala/TheLo…](https://github.com/achimala/TheLongSilence)This took a few steps, not one-shot. But the process was simple and almost entirely hands-off. Two main ideas: 1) Adversarial subagent, based on[@mattshumer_](https://x.com/mattshumer_)'s Claude of Duty prompt: Have an independent - Had to check comments to see if this was a joke. Holy shit.
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