The only official release is for PC (http://katawa-shoujo.com/). Source: over 1 year ago

Katawa Shoujo: When I played this in the summer, I messed up A LOT of things on what to do. More or less, I sorta goofed up in terms of routes and such. And I picked it back up and It's honestly one of the best indie VN's I've played. This game is really a different breed. Both in terms of effort and story. I can proudly give this one a solid 9/10. (You can download it at https://katawa-shoujo.com ). Source: over 3 years ago

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