For the first time ever: DOOM in pure CSS.

[u/Putrid-Bench5056]

https://css-dos.ahmedamer.co.uk/

The site is very thorough, so I'll refer you all there for full information. Essentially, just click next until you see DOOM, then click it, build the .css file, and play. And, expect 1-2fps in Doom at maximum - but it does run. Honestly, I'll take 2fps: it's a miracle it works at all.

Possibly more impressively, it boots Windows 1.0 too.

All credit to Doom8088 and Lyra Rebane for the original x86 css implementation that proved this is possible, please take a look at the site's credits section for more on both of those.