Pretty much everything I've tried has worked seamlessly out of the box. Obviously, the same issues crop up as with any other Linux system: you pretty much cannot play kernel level anticheat games, womp womp. I might have installed my video drivers myself, I honestly don't recall, but it's as easy as grabbing them from pacman.

For my particular setup, I'm using an Nvidia card and mostly only use Steam for games, although I have gotten Proton to work with a couple of games outside of Steam.

In case you're new to Linux in general, when I first installed Steam, I noticed I could only play a small fraction of my games and was disheartened, but you just have to turn on the Proton compatibility layer and you're good to go.

I do also have a Windows 11 VM for any compatibility issues, but I honestly haven't booted it up in months.