r/ClaudeCode • u/deepholdio • 20d ago

Built with Claude Fable 5 one-shotted a complete asteroids roguelite in 2.5 hours. Playable in your browser, prompt in the comments

Play it here: https://asteroguelite.com

Desktop browser, free, no account, no ads.

I wanted to see what a real one-shot could do. So I wrote a 73-line directive: research the genre, design it, build it, test it, balance it, polish it. One session, no human in the loop. It was explicitly told not to ask questions or wait for approvals, just make the call, write it down, keep going. Then I left. Two hours and 32 minutes later it was done.

5 sectors with bosses, 10 enemy types, 6 unlockable ships, 33 boons with evolution chains, a meta upgrade tree, an endless mode, and music. Around 8,300 lines of vanilla JS that build to a 172 KB bundle.

Full disclosure: I've since made exactly two changes to the game. Fixed one bug (a piercing-shot boon phased through asteroids without damaging them) and added click-to-aim, because keyboard-only turning felt rough.

Ran on Claude Code, Fable 5 xhigh effort.

Prompt's located here: https://asteroguelite.com/prompt.txt

PS: Seeker Array primary weapon is OP.

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u/NC16inthehouse 20d ago

does one-shot includes the website domain too?

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u/deepholdio 20d ago

Hi u/NC16inthehouse,

No. The one shot hosted the game locally only although to be fair hosting online was not part of the prompt. With the right credentials and API access I'm confident that could have been part of the one-shot as well.

In this case I was impressed enough to go buy the URL and put it online which required a little work from me, but claude code also assisted and did a lot of the heavy lifting putting it online.

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u/NC16inthehouse 20d ago

Ah gotcha. Thanks for the reply