You can just look at their website -- it's surprisingly in depth even with their targeting systems and stuff. It's wild how open they are about it.
There are some that don't support Linux and likely never will like Valorant or Call of Duty, and even fewer that dropped Linux support like Apex Legends.
I'm sure there was some luck involved, but just having a singular focus on computer adjacent fuckery, I managed to build a pretty successful career being 100% self taught.
[0]https://www.videogameseurope.eu/news/statement-on-stop-killi...
Now install Spotify, VSCode, Steam for Linux and you will see the same kind of chatter with backend services.