Here is a very popular entrant to the latest JS13KGames contest that ended this week. This Quake clone is amazing given the JavaScript limitations, and takes me right back to 1996 when I installed it off a magazine cover disc (when the demo even then was 10 megabytes).
The game comes from Dominic Szablewski (@phoboslab) and it’s playable in the browser. I have yet to explore the source and see how the map parser works.
Play here: https://phoboslab.org/q1k3/
MIT Licensed
Please be aware that this projects makes use of Sonant-X (albeit heavily modified) which is published under the zlib license.