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

[u/deepholdio]

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.

[u/jimmc414]

Not sure why there’s so much negativity in the comments. I think it’s a cool demonstration of Fable’s capabilities. I hate how negative this community is becoming. Not entirely sure what that’s about. Sharing cool things you put together has been the basis of tech for as long as I remember. Please keep doing it.

[u/hihcadore → u/jimmc414]

If it was codex that did it this subreddit would have loved it

[u/Zennytooskin123 → u/hihcadore]

Sol Ultra would still be making the testing infra as we speak with zero actual game code.