Those games require a new launcher to be played.

Also you need to installl protontricks

type protontricks --gui and run winecfg

add all the x3audio, xapofx1, xaudio2 dlls. this will get the sound working

[https://github.com/ValveSoftware/Proton/issues/1981#issuecomment-450759700]()

Here is a code for a better launcher by me on github