People up-voting this only to read later and find out what Proton is. I thought WINE was the Windows Emulation Layer on Linux. Although, of course, Wine Is Not an Emulator.

> what Proton is. I thought WINE was the Windows Emulation Layer on Linux

Proton is just a fork of WINE[0], with a gaming focus and some Steam-specific compatibility additions.

[0] https://github.com/ValveSoftware/Proton/