People on protondb claim to have success running that using Luxtorpeda. Also id software released the source code for the game so you could just run a native Linux build with OpenGL support: https://uhexen2.sourceforge.net/. Source: about 1 year ago

I also wanted to throw in the link for the command line thing I mentioned https://uhexen2.sourceforge.net/ it's in section 1.3 but I'm genuinely not sure how to use it or what a command line even is lol I've also tried console commands but with no luck. I hope this helps! Source: over 1 year ago

My best friend and I have been meaning to experience this game for a while now but we can't seem to connect to each other. We are installing from http://uhexen2.sourceforge.net/ windows 64bit version. Source: over 1 year ago

I wouldn't bother running it on the original executable, just use Hammer of Thyrion. It's an updated source port. Source: about 2 years ago

It's generally recommended to download DDLC from ddlc.moe , not Steam. Source: 8 months ago

(this game was downloaded from the website, and not Steam). Source: 8 months ago

So as a result, I'm playing mods. I don't really know some awesome mods I could play, but I'm trying out EMR. I'm trying to do exactly what the mod creator tells me. Download DDLC from ddlc.moe, download the file, and drag the files into the original DDLC file. I'm confused, because It literally denies me to drag and drop. It just won't let me. And before you ask, I have no experience with any type of computers... Source: 9 months ago

(Just skip this ahead since most will already have done this) Download the base game at http://ddlc.moe. Source: 9 months ago

Acquire a fresh copy of DDLC (preferably from https://ddlc.moe as steam likely won't work). Source: 10 months ago