Running games through Steam's Proton is great. But what if there is a secondary exe or configuration application bundled with the game? How can you launch it if Steam itself only launches the game?
Simply run this command in a terminal:
cd /path/to/steam/steamapps/compatdata/20920/pfx STEAM_COMPAT_DATA_PATH="/path/to/steam/steamapps/compatdata/20920" WINEPREFIX=$PWD \ "$HOME/.steam/root/steamapps/common/Proton 5.0/proton" run ./drive_c/path/to/custom_application.exe
20920 is the game id.
cd (change directory) to the proton prefix in question. If you don't have any custom steam libraries it likely will all be within your home directory. To find it easier you may run
find . | grep compatdata from
~/ and when you find it,
cd to it.
Real world example:
cd /media/michael/SSDGAMES/steam/steamapps/compatdata/20920/pfx STEAM_COMPAT_DATA_PATH="/media/michael/SSDGAMES/steam/steamapps/compatdata/20920" WINEPREFIX=$PWD \ "/home/michael/.steam/root/steamapps/common/Proton 5.0/proton" run \ ./drive_c/flawless/FlawlessWidescreen.exe
Someone in the comments below created a bash script that makes this easier: https://gist.github.com/michaelbutler/f364276f4030c5f449252f2c4d960bd2?permalink_comment_id=3921629#gistcomment-3921629
hey, I'm trying to do this here but without success, I need to run pes21 lite + sider.exe at the same time, but proton can't do this, do you know a way to run 2 .exe programs in the same prefix at the same time? when I run sider.exe proton wait ot finish program to start the game.
I'll appreciate any help, tks....