dxx-rebirth VS crispy-doom

And that's the first level of Descent. :) I literally just started a brand-new game yesterday of Descent. DX-Rebirth.

Find a remake of the game ported to a modern engine. https://www.dxx-rebirth.com/ appears to be a port of Descent 1 and 2 to the Source engine. It won't help with you running the 3DFX version, of course, but this might actually be better?

I loved this game. You can still play it with DXX Rebirth

I would look at DXX rebirth, https://www.dxx-rebirth.com even if you just want to add the expansions to your steam version, you should be able to use its instructions to add the levels to your version.

Descent 2 - so long since I last played any Descent game I forgot how the experience was, but hey there's a source port!

Or if you still want to play the originals, the DXX Rebirth mods also make it easy to play on modern computers!

It might just be easier to download and extract a fresh copy of crispy doom, which should have all the default settings: https://github.com/fabiangreffrath/crispy-doom/releases/tag/crispy-doom-6.0 .

To make it just a tad higher rez/support widescreen and other quality of life improvements, Crispy Doom. (https://crispy-doom.org/)

So there's this project that I absolutely love which is Crispy Doom, a source port for doom which aims to retain the original vanilla gameplay while adding some QOL improvements such as higher resolution, widescreen support etc...

PrBoom+, Crispy, Woff!, and others are more vanilla friendly, meaning that you get the same experience as the original clients.

Crispy Doom - Limit-removing enhanced-resolution Doom source port based on Chocolate Doom.