Anything that uses the evil hexbear is hit or miss depending on which binary it ships with. Epic ships a Linux native version, that developers can allow to tunnel through Proton to the Windows binary, but unlike the Windows binary it doesn’t have kernel level access. Meaning it’s “less effective” at preventing cheating since it can’t snoop your entire system using root access.

So basically a game developer can flip a switch to allow anything to run on Linux, but they can also unflip that switch and brick Linux installs from playing online.