Linux Gaming

I play a lot of Apex Legends. It works very well on Linux.

Xonotic is always a good one.

My go-tos are tf2 and tf2 - that is Team Fortress 2 and Titanfall 2. Both work great on Linux and have really dedicated communities. Titanfall 2 even has the Northstar client.

Hunt Showdown runs on Linux with Proton and it has EAC

CS:GO, Halo MCC, Overwatch 2

though I don't know if OW2 counts as good anymore, certainly not a fan of the changes, but it still works on Linux

Battlefield 4 is still good. Plays well under Linux, graphics are good, servers are still packed and it's quite challenging.

Insurgency Sandstorm is pretty good and CS:GO is always a classic go-to.

Older game but red orchestra 2 is a classic ww2 shooter with a decent online community. Matches are around the 20 - 30 minute mark.

I play apex legends and sometimes overwatch. Csgo is also an option but i haven't played it yet

Splitgate

Shatterline and Caliber

Both free to play, on Steam, and work using Proton.

Krunker is nice for a quick match. You can play it directly from your browser or download it from steam

Not sure if you're fine with a paid game, but Halo: The Master Chief Collection recently got Linux support for multiplayer - though they have the Steam launch options reversed so you have to select EAC disabled at launch, in order for it to be enabled lol (thus allowing you to play online)

Additionally, Halo Infinite's multiplayer mode is free, and also works on Linux.

Bzflag

Jk

I play halo mcc and infinite and also recently started playing warframe thats more of an mmo shooter

I like Xonotic

Why not just CS:GO? But I’m only saying this because I have no real recommendation tbh. For offline I can recommend Ravenfield. It’s really fun even though the native Linux version is kind of broken when using mods which is kinda the point of the game. Works fine using Proton though