Found this by accident: cssQuake - Quake running in the browser, rendered entirely as HTML/CSS 3D geometry via PolyCSS.

No WebGL, no canvas - the geometry is actual DOM nodes you can inspect in devtools while playing.

What used to choke on weaker hardware decades ago now runs as pure CSS layout/paint.
Open source on GitHub too.

https://cssquake.com/

Have fun!

#CSS #HTML #WebDev #Quake #OpenSource #FrontEnd #Fediverse