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Koil

Online Multiplayer Browser Game with Old-School Raycasting Graphics.

From tsoding·Updated June 22, 2026·View on GitHub·

> [!WARNING] > This Game is a work In Progress! Anything can change at any moment without any notice! Use this Game at your own risk! The project is written primarily in C++, distributed under the MIT License license, first published in 2024. Key topics include: doom, game, multiplayer-game, raycasting, typescript.

Koil

[!WARNING]
This Game is a work In Progress! Anything can change at any moment without any notice! Use this Game at your own risk!

Online Multiplayer Browser Game with Old-School Raycasting Graphics.

screenshot

Offline version available on GitHub Pages: https://tsoding.github.io/koil/

[!WARNING]
We are intentionally rendering on HTML 2D Canvas without employing any hardware acceleration to see how much we can push the boundaries of the software rendering in browsers. So the renderer may run unexpectedly slow on some machines and browsers, but we are working it.

Quick Start

Dependencies

  • Build from scratch commit 855be928 of C3 compiler. This commit is pinned and will not be updated.
  • Clang (18.1.8+)
  • Node (v20.9.0+)

We are working on reducing the amount of dependencies, please, bear with us.

console
$ npm install $ node run build $ npm run serve $ <browser> https://localhost:6969/

This script starts up http-server at http://localhost:6969/ to serve the content of the current folder and the server of the game. See serve.js for more details.

References

Contributors

Showing top 9 contributors by commit count.

View all contributors on GitHub →

This article is auto-generated from tsoding/koil via the GitHub API.Last fetched: 6/27/2026