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It's that time of the year again - time to start thinking about the js13kGames competition. The sixth edition will start on August 13th, 13:00 CEST and will run for a month. For those who don't know it yet: it's an online competition for HTML5 game developers where the fun part is the file size limit set to 13 kilobytes. Check the rules for details.


There are always notable judges, lots of cool prizes, and free t-shirts for all entries shipped worldwide. See the forum topics from previous years for reference: 2013, 2014, 2015, 2016. Follow the compo profiles on Twitter and Facebook to be up to date with all the news and announcements.

I'm looking for prizes and sponsors, so if you can help with either of those please get in touch!

So, who's going to participate?

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On 16.06.2017 at 7:38 PM, Red Spark said:

As I transitioned from commercial gamedev into another dev occupation, I can finally afford making experimental games for fun, without feeling of missing out in terms of money :)

Sounds great, enjoy the competition then!

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20 hours ago, remvst said:

Hoping that inspiration will hit once you reveal the theme so I can participate for the 5th time :)

I do hope you'll find the motivation as the compo wouldn't be the same without you :D

In the meantime - next update.

- Codility

- Tomasz Wesolowski

- 2 × Asset Forge tool
- 10 × Kenney Game Assets 2
- 5 × ImpactJS game engine
- 1 × Proto.io account


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Next update.

- AirConsole

- 5 × Complete Mobile Game Development Course
- 5 × Virtual Reality Game Development Mini-Degree
- ∞ × AirConsole Hero
- 5 × Making Money with HTML5 ebook
- 3 × CodePen Pro account
- 2 × $13 Amazon voucher

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12 hours ago, Jammy said:

im just wondering about the package size rule. E.g. if my code is 40kb, but once compressed into zip is 13kb - would that count as a valid entry?

Yes, absolutely. The size limit is for the zipped package only - it doesn't matter how big your initial source code or assets are.

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Hi Everyone!

Just a reminder that Ga,  the "made-for-jsk13" micro game engine, is open for business again this year!


I has most of the features of Phaser, but is 100 times smaller!

(... and a helpful contributor from last year's competition added base64 image support which makes it even better than ever.)

The core engine compresses down to 6.5k, which leaves you another 6.5 for your game logic (which is more than enough!).

On the off chance that you have a few k left over for sound, you could try:


But you don't even need the whole library, all you need is the single `soundEffect` function, that can generate any possible sound (or music) you might need for your game:


Have fun everyone!!

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On 30.07.2017 at 4:31 PM, d13 said:

Just a reminder that Ga,  the "made-for-jsk13" micro game engine, is open for business again this year!

Thanks for maintaining it, I'm sure some devs will use it during the compo!

On a different note - GitHub just posted a cool article with some nice entries from last years, etc: https://github.com/blog/2409-build-a-game-in-13kb-or-less-with-js13kgames

Also, updating the prizes list:
- 5 × NodeBB hosting
- 5 × Cloud9 IDE subscription
- 10 × JSBin Pro account
- 10 × Glitchbuster game

Yup, Glitchbuster is the game from last year's compo, just like Evil Glitch.

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