This jam is now over. It ran from 2021-02-26 12:00:00 to 2021-03-03 22:30:00. View 4 entries

Welcome to first official Colyseus Multiplayer Online Game Jam

Create an online multiplayer game with Colyseus + Unity in 72 hours with a chance to win up to $500!

Theme: "Simplicity"

The gamejam theme's purpose is to serve as a guide and inspiration towards your game prototype.


We're going to be giving up to $500 for the top 3 winners!

  • 1st place: $500
  • 2nd place: $200
  • 3rd place: $100

Games must follow the rules described below, and are going to be judged by the public and evaluated by Colyseus staff


  • You must be 18+ years old to participate.
  • You can be a team of one, or a team of many people. There's no restriction over your team size.
  • The game must be multiplayer online, playable with at least 2 clients connected simultaneously.
  • Entries must be using Colyseus Multiplayer Framework
  • Entries must be using Unity
  • Entries must follow the theme announced at the day #MOGJ starts.

Assets from Tech Demo #1 can be used, all other tooling/software needed is up to you!


  • Your game must be exported & playable in the web browser, using Unity's WebGL export.
  • You must upload the game using's submission system.
  • Make sure your final build uses a deployed version of your server, and connects using secure WebSockets (wss://), otherwise players won't be able to test it

Join the community!

Join our Discord server and connect with potential participants of the jam. Our community is a friendly place for professionals, enthusiasts and students of online multiplayer games!


All submissions
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a minimalistic strategy game for two
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See description if the game doesn't load!
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Avoid getting spotted and get to the goal
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Play in browser