@aral @Pionir
There is an annual game jam competition that tries to keep this spirit going. It is called JS13K, and the aim is to make a web browser game that fits into 13 KB.

I cannot find why 13KB was chosen as the limitation, but it might be something to do with reducing number of segments (or packages for simplicity) that needed to be transferred from the server to client. Even though TCP's limit is 64kb per package, someone found that 16kb is more acceptable by most routers. My speculation is that game jam planners took that as the size limitation for the competition, and challenge developers to fit their game into a single TCP/IP package. Since some of this 16kb is overhead needed to get the payload across, actual payload ends up being 13kb and some fraction. I am not sure if that is the actual reason for this choice, but it sure makes a reasonable limitation for a, challenging and fun competition.

In reality, different internet layers have different segment size limitations and those TCP packages will end up broken into smaller sizes anyway, but there is something interesting seeing that a whole game load faster than some static sites.

https://js13kgames.com/
#js13k #game #gamejam
js13kGames

Check out js13kGames, the coding competition for web game developers, with a hallmark 13KB size limit.

js13kGames 2025
Enclave Games Monthly Report: February 2026

Finally a truly positive month: we've shipped the js13kGames 2025 t-shirts, released a Valentine's level in Flood Escape, and started the countdown to Gamedev.js Jam 2026.

Enclave Games

The #js13k 2025 t-shirts were finally shipped! 🎉

https://js13kgames.com/2025/blog/stop-swagger-time

Thank you all for your patience!

#gamedev #gamedevjs #swag #tshirts #dice #prizes

Stop! Swagger time!

It seems having issues with the shipping is our yearly tradition, but I didn’t expect politics to come in and mess with the process. That’s exactly what happened this time, beside a few absolutely relevant problems we also encountered along the way.

js13kGames 2025

I finally posted about my lastest js13k Games entry, Alley Kitty. It is mostly about technical stuffs and compression, but I am sure there are at least some who find these things interesting :)

Read it all here: https://gabor.heja.hu/blog/2026/02/09/alley-kitty-my-js13k-games-2025-entry/

Play it here: https://js13kgames.com/2025/games/alley-kitty

#js13k #js13kgames #blog #devlog #javascript #html5 #html #gamedev

Happy holidays to all celebrating!

#js13k

#EnclaveGames #MonthlyReport: At the beginning of every October the js13kGames competition winners are announced, and I also found the time to fly to San Francisco for the GitHub Universe conference third year in a row.

https://enclavegames.com/blog/monthly-report-october-2025

#gamedev #gamedevjs #js13k #GitHub #JavaScript #HTML5 #SanFrancisco #GitHubUniverse

Enclave Games Monthly Report: October 2025

At the beginning of every October the js13kGames competition winners are announced, and I also found the time to fly to San Francisco for the GitHub Universe conference third year in a row.

Enclave Games

🚀 Biralo Beyond is now open-source on GitHub!
Born from my JS13kGames 2025 entry, this version packs extra polish, new content, and boss battles.
🎮 I’ll drop the Newgrounds link in the reply -It includes the GitHub repo for anyone curious to dive in.

#pixelart #grafx2 #godot #indiegame #indiedev #newgrounds #js13k

Update about #js13k t-shirts: from shipping the 2025 one, through getting the originals, to buying Retro and others from the shop.

https://js13kgames.com/2025/blog/tshirts-galore

#gamedev #gamedevjs #gamejam #swag #tshirt #JavaScript #HTML5 #indiegames

T-shirts galore: two originals for $13

If your entry ended up in the overall top100 results, then you’ve received an email today containing all the details about this year’s t-shirts and how to claim them, plus an offer to grab the limited amount of original t-shirts from previous years.

js13kGames 2025

THANK YOU SO MUCH goes to ALL our experts - they spent their time playing #js13k 2025 entries and providing valuable feedback!

Overall:
- Michelle Duke
- Björn Ritzl
- Jupiter Hadley
- Christer Kaitila
- Ania Kubów
- Emanuele Feronato
- Noël Meudec
- Clément Pasteau
- Dann Sullivan
- Victor Debone
- Jedidiah Weller

Online:
- Ben Allfree
- Michal Chojnacki

...

Top13 WebXR category entries in #js13k 2025:

1. AL13YCAT by Alex Swan
2. Kittens Crossing by Samuel van Egmond
3. Inside Cat by Randy Tayler
4. COD: Black CAT by Sorskoot
5. 9 Lives: An Escape Room by Kev Etchells
6. Catway XR by JackDesBwa
7. Wake the Cat by Andrew Higson-Smith
...