One of the most entertaining sub-genres on GitHub is the "re-implementation." Programmers often try to recreate modern games from scratch just to see if they can.
Developers turn code into live websites instantly using GitHub Pages. This allows HTML5, WebGL, and JavaScript games to play directly in a browser without installation.
Note: To find games, search "game," "doom," or "raycaster" in the GitHub search bar, or check out curated lists on Google (search: "awesome games on github").