Quake 1 in 13kb - Q1K3 

Here is the full playthrough of Quake 1 in 13kb by ‪@dominicszablewski638‬ - phoboslab.org/
This is running within a browser - Browser used - Google Chrome - js13kgames.com...
The project has been worked on by developer PhoboSlab - Dominic Szablewski
Developers X/Twitter: x.com/phoboslab
Making of Q1K3 by ‪@dominicszablewski638‬ • Q1K3 - Making Of
Features:
This hack only uses the assets already available in the game (except for the levels, title screen, and intermission background, of course).