Make sure to pay close attention to the prerequisites for Glorious Eggroll. I didn't at first, thinking all I had to do was put the folder in compatibilitytools.d. I was wrong. At least with SparkyLinux, the prerequisites were only partially fulfilled at first boot... I think the issue was winetricks.

Important part within Glorious Eggroll's README.md...

PLEASE NOTE: There are prerequisites for using this version of proton:

You must have wine installed on your system You must have winetricks installed on your system You must have wine dependencies installed on your system. See https://www.gloriouseggroll.tv/how-to-get-out-of-wine-dependency-hell/ You must have vulkan gpu drivers/packages installed properly on your system. See https://github.com/lutris/docs/blob/master/InstallingDrivers.md