A whole boss fight in 256 bytes
https://hellmood.111mb.de//A_whole_boss_fight_in_256_bytes.htmlThat domain is such a blast from the past for me. I spent so many hours working on projects with free webhosting as a teen!
dang/HN: this domain should probably be added to the list where the subdomain is shown next to the title, since subdomains are users' webspaces. (Might be a good candidate for the public suffix list: "[DNS labels] under which Internet users can (or historically could) directly register names".)
And it came in 5th place in the competition. The winner was this one which is 16 bytes...
I clicked on this fearing it was a "256 bytes of JS" (plus X GB of browser), and was pleasantly surprised it was actually 256 bytes.
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Technical write up for "Endbot"
256 bytes MSDOS program with plot, sync, sound, and payoff.
Released April 4th at Revision Demoparty 2026.
This takes me back to the NES era, where developers squeezed entire worlds into a few kilobytes of ROM. What blows my mind here is that even the NES had ~40KB of program space — and this entire boss fight, complete with sprite animation, scrolling landscape, and MIDI music, fits in 256 bytes. The NES ROM header alone is 16 bytes. Incredible work.
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Audio doesn't work, but here's an emulator link
https://parkertomatoes.github.io/v86/?type=com&content=aACgB...
Didn't run it (yet) but it looks nice. Great that some people are still able to optimize code! I'm wondering if this would run on actual hardware (VGA + a sound card supporting MPU401 emulation)
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