idk where you looked, protondb.com is a good database for this stuff, from your later reply insurgency sandstorm and hund showdown are both "gold" rated, they should be okay
but the thing is ... you could just try for yourself, for free

At this point it's pretty much only the competitive games with kernel level anti-cheat that don't work on Linux because of their kernel level anti-cheat.

But then again, if 90% of the games you play are competitive games that require kernel level anti-cheat, you should probably consider expanding your gaming experience lol

Would "Steam Deck compatibility" be a good proxy, at least for Steam games?

I just made the switch this weekend. I have not had a single incompatibility yet. I have seen an oddity here and there in Helldivers 2, but nothing crazy.

Oddity 1: In normal windows play async issues sometimes happen where a player steps on a mine in the other person's client but not their own. They continue to play because their client doesn't mark them dead. To the other person, they appear as a person missing some number of body parts (sometimes just a floating torso). We call this torso mode.

Since switching to linux I have not seen my friend go torso mode a single time. He still sees me go torso mode.

Oddity 2: The artillery rounds are color coded for what each of them does. Since switching to linux they only appear silver for whatever reason. It's a nonissue, I just read them when I walk next to them. If anyone asks my character is colorblind.

One additional note:

If you install steam with a flatpak, you're going to have to tangle with the permissions related to a flatpak. Once you add directory permissions for an additional directory via flatseal (for example, if you want a library on each of your harddrives), you won't have to touch it again and it's great.

Maybe these issues are significant to you, maybe they aren't. Ultimately, god I love my system starting up in just a few seconds. And having true control over it.

Honestly I have a ridiculous pile o' games like a lot of us do, and I've yet to find something (that's not VR) that I cannot play .

For reference I'm running OpenSUSE Tumbleweed with a 30 series Nvidia card. Wayland, two monitors, main is 144hz ultrawide 3440 x 1440, another is 1080p 60hz.

First off there's a few programs out there to get you "Glorious Eggroll" versions of Proton which add even more stuff Valve can't distribute in their versions.

This beautiful software right here looks about right: https://davidotek.github.io/protonup-qt/

Steam works fantastically. Heck, Proton works better than native Linux builds sometimes! Deck playability is an even bigger mark of quality.

Even EA's silly launcher works. I got Titanfall 2 and that Sims 2 Ultimate they gave away ages ago working like butter.

I also love actually owning my games, so I use Heroic Launcher for GoG titles.

Oh! I even have CD games or old .EXEs windows would refuse to even install anymore! Don't worry, Linux has got this. I use Bottles to have separate environments for those games to install to and run. Majority of the time it works great but this is where things can get iffy. But hey, Windows wouldn't run them at all!

Wanna know what made me switch? Vermintide 2 kept giving me BSODs in Windows 10 with some super vague error code that made me think "Oh crap, please don't tell me my GPU is dying."

Nope! Linux ran it with zero probs once I fixed some small quirk to make their dumb little launcher work.

Cherry on top? All my RGB stuff works with Open RGB or my recently retired Corsair keyboard works with "CKB Next".

The community has made incredible strides. My Win10 partition only exists because it has Windows Mixed Reality, which they're abandoning. But not to fear, the Monado project is making HUGE improvements.

Give it a shot. I think you'll be surprised. :)

Most games that don't have kernel level anti-cheat tend to work.

Have you tried to play the games or did you look them up on a site? I've found that unless you are looking at a popular new game, a lot of the games listed are saying that they don't play, but we're last checked in 2023, and they do work now but no body has updated the new results.

Sorry but how did you only have 10% running on linux a few months back? I run every game except apex legends, warzone and fornite... This is ridiculous misinformation of you

Its a fairly safe bet that your offline games won't have much trouble, from my experience.

I'm on Garuda, every game I have tried has worked great, sometimes I just have to choose a different proton version with an easy pull down menu. The only game I have given up is Destiny 2, because they say they will ban anyone on Linux because of their anti cheat.

What kind of games do you play? Unless a game has anticheat, it is pretty much guaranteed to run on Linux.

As I said over and over again: my biggest pet peeve with Linux is that there are often several ways to accomplish something but many are somewhat distribution specific and not really standardized.

Who doesn't love to find a tool that has install instructions like:

Start by installing all required packages with sudo apt get package1, package2,... then clone this repository and...

Just to realize that a) you're not running anything Debian based and b) you first step is now to find out how these packages are named in your package manager.

Or tutorials that tell you to do X and you only find out, that they're assuming (but not telling you) you're using Debian and some old package versions that now have a completely new syntax in their configuration, so that either the tutorial doesn't work or you maybe even f up something by changing values that you shouldn't touch.

Best is, of you find help in a distribution specific forum/wiki/... But not all problems can be found there