[lenlorijn]

I've only had this experience with one game that was marked as not supported at all (Batman: Arkham Asylum). After first setting a different version of Proton for the game as per internet instructions I could not get past the startup menu at all. I tried all the buttons and got quite frustrated that I had to quit the game with the available shortcuts every time.

Then I found out I could just click next on the touch screen :')

I haven't had any issues with games since. Lost of games, even some marked as not playable, ended up working fine.