Quality versus quantity problem. The most popular games not made by Valve tend to not work at all, and a quick look at Proton DB shows of the top 100, only abou

Quality versus quantity problem. The most popular games not made by Valve tend to not work at all, and a quick look at Proton DB shows of the top 100, only about 20% are in the "no issues" (platinum) category. Gold is "playable", and from experience, there is a lot of variability there. It includes problems that would lead to refunds and bad reviews on the original platform.