Submissions open from 2025-04-13 15:00:00 to 2025-04-26 15:00:00
Starts in

Gamedev.js Jam celebrates Web games - build an HTML5 game within 13 days of the jam on a given theme, it runs between April 13th and 26th. Also, there are prizes!


The theme will be announced right at the start. Remember that your entry will be judged based on how well you implement the theme, but you can interpret it however you like.


Join us no matter your skill level - this game jam is a perfect opportunity to create your very first game, or build a prototype for your next commercial hit. Almost two weeks of development time should be more than enough!

You can use #gamedevjs hashtag on Twitter to share your progress, ask for feedback, see what others are building and hopefully help them out if they need it. There's also a Discord server for direct communication!


Submit an HTML5 game between April 13th and 26th 2025. It can be a solo submission, or a team effort (no hard limit on the team size). You can even submit more than one entry if you want to. Submitted games should have English as the default language.


Voting will be open to all who submitted a game, and will happen for 13 days right after the submission period ends - between April 26th and May 9th. Overall winners will be announced on May 10th, and challenges on May 11th.

Games will be voted on based on a given criteria: Innovation, Theme, Gameplay, Graphics, and Audio. The Overall ranking will be based on the summary of those.


  • Platinumto be announced
  • Goldto be announced
  • Silverto be announced
  • Bronze: Enclave Games, js13kGames


There are optional Challenges in the Jam - entries submitted to those will be judged separately by the panels of dedicated experts, and each offer unique prizes for the best games.

  • to be announced

You are free to take on any of them, or even multiple at once.


There are two levels of prizes: for all the entries, and for given Challenges.

Overall prizes

Those prizes will be given to the best entries of the overall ranking:

  • to be announced

Challenge prizes

  • to be announced

Winners will also be promoted via our Twitter, on the website, and in the Gamedev.js Weekly newsletter.


Panel of experts giving feedback to your entries (with their top5 picks each), or judging games from given Challenges.

  • to be announced


You are free to use any game engine or library as long as the build/export is playable in the browser (so Unity, Unreal, or Godot are absolutely fine). We recommend using Phaser, Defold, or GDevelop, you might also consider Cocos or 8XR, if you'd like to aim for multiplayer you can check Colyseus or, and if you need an extra challenge, you can try the js13kGames-specific size-constraint ones like Kontra, Goodluck, or LittleJS.


The short version is: anything that can run on the Web in a browser without extra plugins is considered a valid jam entry. It's highly advised you create new content for the jam - submitting your old demos or already finished projects makes no sense.

If you have any questions or concerns please ask at the Community forums or join our Discord server.