Quake 1 in 13kb - Q1K3

Here is the full playthrough of Quake 1 in 13kb by ‪@dominicszablewski638‬phoboslab.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).

[@TWKIC]

Crazy to think this is smaller than people profile pictures on social media

[@thesegaguruxtra]

Shocking right? It's unbelievable how this came to be

[@damazywlodarczyk]

It's smaller than the thumbnail of their photo!

[@SomeOrangeCat]

Assembly is some kind of crazy shit! Its very difficult to master...but if you...

[@scobeyrowley5115]

So clever

[@thornstrikesback]

Imagine if devs could do this back in the early 90s.... the amount of content they could fit on a single 3.5" floppy and how many games we could fit on our 50mb HDD would be insane.
I remember watching a video about how they do this, and i still can't comprehend it.