The company that’s really behind Proton [1] sells „CrossOver“ as a commercial product to run Windows applications on MacOS, Linux and ChromeOS with enhanced compatibility compared to free Wine. IIRC they started out to selling „CrossOver Office“ running MS Office seamlessly on a Linux desktop. If you want to support their effort you could buy a license for under $100 and run many Windows titles and games w/o emulation or the Steam client.