FYI Ubuntu is the only supported distro for this game. Firstly, if you are using the Flatpack or other similar Steam installation, please use this instead:

Steam, The Ultimate Online Game Platform

Steam is the ultimate destination for playing, discussing, and creating games. store.steampowered.com "Install Steam Now" If that doesn't help, what do you see when you run ./stellaris from a terminal command line? Any useful output?  

We don't officially support proton or wine installations I'm afraid. Just the native game on Linux.

raulhax said: I have Steam installed via the nixOS repository, which appears to be the .deb package

Can you 100% verify that please? It is the most common case of won't-start problems with this game on Linux right now.

raulhax said: since I was experiencing the same crash (with no stdout/stderr output when running ./stellaris directly)

So, no output seen at all when you do that?