this post was submitted on 06 Feb 2024
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The way Proton works is really fascinating, and also requires a ton of effort from Valve. Recently found out most games are "unsupported" because they require proprietary Windows Media Foundation libraries that can't be redistributed on the Deck - so Valve actually modifies the source game assets to no longer depend on the proprietary libraries.
These games often run flawlessly with Proton GE, a community version which includes the proprietary libraries (but must be installed via Desktop mode, thankfully there is an app on the Discover store that does this automatically)
I'm glad to hear that the main author of Proton-GE is joining forces with the various non-Steam Linux game launchers to make game compatibility even more seamless for the wider Linux user base in general!
I was also kind of surprised when looking under the hood of proton that a lot of the fixes for games are pretty simple and often the same fix over and over again. Also, it's just basically running winetricks on the prefix to install things like vcrun2022 (Visual C++ runtime) and dotnet48 (.NET runtime). It's pretty simple stuff, really, but priceless when considering that no manual tinkering is required by the average user who would give up as soon as a game doesn't launch once.
Oh, also I should point out that if you want proton to run non-steam games but for it to run protontricks to fix any compatibility issues, just make sure that there's a text file called steam_appid.txt in the same directory as the game executable. The file should contain only the game's app id which you can find on https://steamdb.info/