A note for people who want to go faster than Steam/Proton certification - in Steam settings you can turn on Proton for all Windows games, not just the ones that

A note for people who want to go faster than Steam/Proton certification - in Steam settings you can turn on Proton for all Windows games, not just the ones that are certified by Valve. So far I haven't run into any problems running non-certified Windows games under Proton.