You have. Download Protonge manually from https://github.com/GloriousEggroll/proton-ge-custom/releases and unpack the archive into “~/.steam/root/compatibilitytools.d/”. Each Proton version has its own folder. Restart Steam then you can use Proton GE from there. Its like Wine GE, but optimized for Steam.

And what games are you playing? You can also lookup each game in Protondb as linked before. Protondb is a database of user reports, with often useful information.

What games? Which Steam Proton and Wine-GE versions do we talk about?

BTW there is also a Proton GE and you can use it in Steam as well. Just saying. Some games do need a specific Steam Proton version, either an older or newer one, such as Proton Experimental. Some games are only working with Proton GE (or Wine GE).

And you can always lookup if the game works, by looking into reports from Protondb website (user generated).

Imagine playing Halo, but with the Portals from the game Portal added. They seem to have some abilities like in hero shooter too, but I still have to play the game to know to what degree.

Well, I really want to play the game and hope it will work in the future. If I get banned now, then this future would not be possible for me anymore. Even if I can’t play it right now, I care about not getting banned in this game. The game plays like Halo, but has Portals, a little bit of hero abilities and a good map creator; perfect!

Edit: BTW I have a Steam Deck and could play it on the device, if nothing else works on PC. So by trying to get around on PC and getting banned would take this away from me too.

The thing is, they seem to not block Linux entirely, as it runs (and is officially supported) on Steam Deck. From the outside it looks like the anticheat tool works only on certified devices or configurations when they use Linux. Maybe this is the first game that only works with a specific Kernel. This would make sense, as this is a Kernel level anticheat that would only work with known or whitelisted Kernels in example.

I’m just speculating here, so don’t want to spread false information in case this is wrong speculation. But the official support for Steam Deck is correct.

I wouldn’t experiment with renaming or deleting such files to trick an anticheat tool. There could be a potential to flag and ban a player account. It’s too risky to me.

We assume its probably the anticheat, because its a Kernel level anticheat. Maybe it only works with an unaltered image of the Steam Deck OS and Kernel. This is highly speculative and it might be just a bug on the game or Proton side or something. This is still beta and the first day, so they collect information and see what the users have to say. Hopefully they will address this issue. At the very least being open and explain the situation, so we know for sure.

SteamDeck=1 %command% was the first thing I tried. Marvel Rivals has not a similar problem, because Marvel Rivals supports general Linux and the Steam Deck. The reason why the SteamDeck variable is needed is, because with a recent updated of the game the launcher does not work properly in Proton. And in Steam Deck mode the launcher is not used.

But with Splitgate 2 it seems like they deliberately does only support the Steam Deck itself. So setting a variable to trick them is not enough. At first glance it looks like a similar problem, but only the outcome is the same. The problem is different.

For me game is running. I have the newest update of Marvel Rivals Version 20250515. In the past it would not run with Proton Experimental and had to switch to Proton 10.0-1 (beta) (still do). Also had to add SteamDeck=1 %command%, to make it run again. It runs right now as I write.

Sometimes after a system update I need to restart, otherwise games don’t launch. So maybe do system update now and restart entire PC and operating system, if you didn’t already.