Attempted the glibc fix at https://github.com/GitoMat/Shogun2-Linux-Fix , have not been able to get it to run though.

I haven't attempted to use proton because it then has to re-download the Windows version of the game. Hitting play fails to start the game and this issue seems to affect pretty much everyone who tries. It will require a dev to actually repair the linux native version if it's to function. It would shame to have to deprecate it.