- create a shortcut link on desktop for the specific game in epic launcher
- Go to the properties of this shortcut and copy the url For Tony Haw's Pro Skater 1+2 its: "com.epicgames.launcher://apps/Guppy?action=launch&silent=true"
- Go to steam and add a non steam game to your lib
- Search for '''cmd.exe'''
- Change the launch properties to /k start com.epicgames.launcher://apps/Guppy?action=launch^&silent=true & exit
- Change the name and icon if you will
- done
With these steps, it was possible to use the steam controller and overay in Tony Hawk's Pro Skater+ 1+2.
It says "silent is not recognized as an internal command, operable program or batch file." on the cmd window, and opens Epic Games Launcher.