Protonhax
From wikinotes
Run multiple executables alongside each other within the same proton wineprefix.
Useful for widescreen fixes, trainers, etc.
Documentation
gitlab https://gitlab.com/xaryphon/protonhax
Install
pacaur -S protonhax # archlinux
Usage
Within steam, configure game to launch using protonhax.
rclick game: - properties - # ... launch commands ? protonhax init %COMMAND%protonhax ls # list apps that are running protonhax run ${APPID} ${EXE} ${ARGS..} protonhax cmd ${APPID}