I had very few that actually failed to run, most of the rest is silver with a few bronze.
Native means the game was built to run on Linux without Proton.
Platinum works perfectly with no tweaks.
Gold works great, but may require some tweaks to work best.
Silver runs with minor issues but is playable.
Bronze runs but may crash or have issues preventing comfortable play.
Borked is unplayable.
I drew the line between silver and gold. If I moved it down one spot to between bronze and silver, almost everything I own would run. I think this is fantastic. This is literally running games that weren’t designed to run on Linux at all, and almost all of them run perfectly.
Since that’s going to depend a lot on your own personal Steam library, you can check what works well on Proton with this site. https://www.protondb.com/
You can even enter your Steam Profile link in there and it will show you the ratings of the games you own. Of the 155 I own, 86% had a gold, platinum or native rating.
Yeah. You just install them with Steam and play. The Steam client comes with Proton which runs Windows games on Linux.
For the games that require tweaks, someone on ProtonDB will have said what tweaks is needed to play it. It’s generally just adding one small command to the game properties in Steam.