Try opening steam via a terminal and opening a game. You should see the problem launching the game in the terminal, might be permissions.
Try opening steam via a terminal and opening a game. You should see the problem launching the game in the terminal, might be permissions.
Not really answering the whole question, but you really don’t need a lot. Currently running jellyfin, a blog and some other fun dockers on a raspberry pi (clone), with an external nas though a large USB would do. Start with just “retrieving” movies to your local disk and think what else you need.
That specific game does seem to have problems with proton https://www.protondb.com/app/9420 However it doesn’t seem to be permissions, so either a problem with the games or the specific version of proton you’re using.