Honestly, check https://www.protondb.com/ and look for the games you want to play, it will let you know how well they work out of the box by just installing them on steam and hitting play. The reality is that it very much depends on what games you want to play, if you like CoD and other competitive multiplayer you're unfortunately in the missing 10%, but for most cases you should be fairly well covered.

It’s very strange.

Most games will just launch, no problems. But then you’ll get one title like the above poster has, that just refuses to launch no matter what you do.

Most of the times there’s a work around on ProtonDB that will get you running in a few minutes. But sometimes it feels like, or is the case, where the developers actively prevent the game from launching on Linux.

I previously played with just Steam and there's basically one setting to enable - allowing the install of non-native games - and then (for supported games) it's pretty much the same as Windows. In some cases you need to select the Proton version but generally using "latest" does the trick. There are games that require Proton-GE to work. These were essentially ones where Valve's Proton version doesn't have workarounds for various DRM etc (likely because doing so would get them in trouble). On Steam Deck this is done by pretty much going into the local Appstore in "desktop mode" to install. Other distros may vary.

For non-Steam games it's a bit more of a pain, and can vary widely by game. I've installed a ton either just by running the Windows installer from Wine or scripts provided by Lutris.

Honestly if you've got the cash and want to try things, grab a Deck and give that a shot. If it works for you, take the leap to Linux on PC. Alternatively on PC, add/resize a disk and go dual-boot. The guided installers on Ubuntu variants generally make this pretty easy.

protondb

I think you've gotten some good replies here.

My comment isn't meant to scare away people, but to keep our feet on the ground. Linux gaming has made amazing progress. If you play recent, mainstream games, it'll be very well documented, and most things will work, unless they're explicitly made to not work (such as certain anti cheat systems).

If you play lesser known indie games, really old games, or more specific things (not sure how good VR support is?), you'll quickly encounter issues that may or may not be well documented. Also, in another reply thread to my post, someone commented a game not working because he has multiple monitors on linux. Stuff like that is also still happening.

So it can be really decent, but know that you might encounter issues. Give it a try and see if it works for the games that are the most important for you :).