To ensure games run well on Linux either via Native Linux builds or Windows games with Proton, part of the magic is in the Steam Linux Runtime. A new version of it, the Steam Linux Runtime 4.0 was recently put up with some pretty big changes.
What’s the point of it? It ensures Steam and games run through Steam on Linux work properly across all the many different Linux distributions. Another secret Valve sauce for Linux. Well, not secret at all but you get my meaning I’m sure.
As of Proton-GE 9-22 I still cannot run Diablo II without all the 32 bit dependencies. I hear from people that Wow64 works, but I have never managed to get it to work pure 64-bit.
I think GE is on like 10-25 now or somewhere around there.
Thanks for the heads up. 10-25 worked with the variable PROTON_USE_WOW64=“1”