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js13kGames

Js13kGames is a JavaScript coding competition for HTML5 Game Developers. The fun part of the compo is the file size limit set to 13 kilobytes. It runs between August 13th and September 13th, online since 2012.

js13kGames 2025 winners announced!

3 min readOct 4, 2025

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Here are the winners of the fourteenth yearly edition of the js13kGames competition! Congratulations to all authors of the 197 entries submitted this year.

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Top 13 Overall

The list of the thirteen best overall games in js13kGames 2025:

1. CLAWSTRIKE by Rémi Vansteelandt
2. Cat Survivors by Elias Ku and Alexandra Al
3. Witchcat by Jonathan Vallet and Lylouf
4. Triska the Ninja Cat by John Edvard
5. Black Cat Squadron by Jesper Rasmussen
6. Catculus by Antti Haavikko
7. Non-Mewtonian Cat by Mohammed Saud
8. Whiskers Witch Adventure by Rob Louie
9. Kuro Neko Market by Federico Tibaldo
10. Ashes of Ulthar by Elliot Nelson
11. Echoes of Nyx by Corentin Pillet
12. Celestial Paws by Daniel Cohen
13. Kittens United by Almut Kieffer-Jones

Awesome entries, make sure to check them all out if you haven’t already!

Categories

The overall winners are shared above, while this year’s categories included Desktop (almost the same as Overall), Mobile, Online, and WebXR - here are their results as well:

The Decentralized category results are out too, though the list was quite short given we didn’t have any specific challenges this year.

Partners

Big thanks to our incredible Partners who supported the competition this year!

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Those are: OP Guild, GitHub, Cloudflare, Poki, Playhop, and Geodework. Plus our own brands, Enclave Games and Gamedev.js.

T-shirts and gadgets

This year’s swag include the t-shirt with our one and only black cat Badlucky hidden behind the logo, and a pair of dice: red and black.

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The packages with those, and some of the usual stickers, will be shipped to the authors of the top100 overall entries worldwide for free.

Next steps

Even though the results are out, you can still do a few more things:

  • write and publish your Post Mortem, and then submit it to the Resources page
  • create a YouTube video: trailer, tutorial, or making of, and add it to your entry’s page
  • work on your post-competition version, Director’s Cut, and add a link to it too
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Another option is to continue playing ALL THE GAMES and leave their authors constructive feedback.

Thanks for joining!

That’s it! Congratulations once again to every single one of you who participated by submitting a game, voting on entries, giving feedback, helping others, or just playing the games and hanging out with the rest of the devs. I do hope to see you next time as well!

If you haven’t already, follow us on Twitter (X), Facebook, YouTube, Mastodon, join Slack (or Discord), buy swag at the Shop, and subscribe to both js13kNewsletter and Gamedev.js Weekly.

Also, don’t forget about the other event of ours, Gamedev.js Jam 2026, planned in April next year.

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js13kGames
js13kGames

Published in js13kGames

Js13kGames is a JavaScript coding competition for HTML5 Game Developers. The fun part of the compo is the file size limit set to 13 kilobytes. It runs between August 13th and September 13th, online since 2012.

Andrzej Mazur
Andrzej Mazur

Written by Andrzej Mazur

HTML5 Game Developer, Enclave Games indie studio founder, js13kGames competition creator and Gamedev.js Weekly newsletter publisher.

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