Well this quite a surprise. THE FINALS is one of the most popular new online FPS games that uses Easy Anti-Cheat from Epic Online Services, and as of a recent update — it works on Steam Deck and Desktop Linux.
So far, I haven't seen anything official from the developer to confirm it was actually enabled intentionally, and I purposefully held off on this initially but it's been a few days and it's continued working. I tend to err on the side of caution, since we've seen other games with EAC previously work without knowing why and then break again shortly after. Hopefully THE FINALS will continue working, since it's so popular with it regularly seeing over 90,000 people (peak count) playing on Steam each day.
It can be a little unstable though, with some reporting Voice Chat and a few graphics options can cause crashes. However, now it actually works, testing can be done and so Valve can fix up issues in Proton, and developers on the various Linux graphics drivers as they get reported.
Some shots taken on Kubuntu 23.10, click pics to enlarge them:
If you make sure you set it to use Proton Experimental in the game properties on Steam, you should be good to go for now. There's lots of reports filling up on ProtonDB now too from people playing it across Linux Desktop and Steam Deck.
With my own testing on Kubuntu 23.10 with an AMD Radeon 6800 XT on Mesa 23.3.3 on Epic settings pictured above with FSR set to Quality it has been running really smoothly overall.
Today I reached out to Embark Studios for a statement, so hopefully their team will be able to let us all know what's happening with it officially.
THE FINALS can be found on Steam free to play.