https://demoscene.assembly.org/

My favorite when I was a kid was absolutely, and without a doubt Second Reality by Future Crew. Full screen 3-D object rendering at 30 frames a second on a 486SX/25 CPU without a graphics card. in 1993

Future Crew, active in the early 90s, was a legendary group within the demoscene. They were acclaimed for their groundbreaking demos, like “Second Reality”, that demonstrated advanced programming, visual artistry, and music composition. These works set new standards for what was possible in real-time computer graphics, and they inspired countless artists and programmers around the world. Despite the group’s dissolution in 1994, Future Crew’s influence on the demoscene and the broader fields of graphics and game development is undeniable, and their legacy continues to inspire creativity in the digital world.

Fucking legendary.

And it fit on a floppy

Edit: I remember my friend Nick brought back a copy of Second Reality from ASSEMBLY 93, an annual convention of assembly developers where they would show off their programming prowess with these demos. Me and my friends got to see it before it hit the BBSs and Usenet. So fresh, yo!