EAC has an option for Linux/Proton support, but it has to be explicitly enabled by the developer. I believe it ships a Linux binary that runs alongside the game

EAC has an option for Linux/Proton support, but it has to be explicitly enabled by the developer. I believe it ships a Linux binary that runs alongside the game, poking into the wine environment. EAC works just fine in proton with Halo Infinite, for example.