it probably matter in windows, like some anticheat need it turn on, in linux said anticheat doesn't
it probably matter in windows, like some anticheat need it turn on, in linux said anticheat doesn't even bother running 
ujust reset-steam
steamapps.old steamapps.bak steamapps1 etc


.desktop file in the ~/.local/share/applications/ directory.desktop file yourselfmenulibre?/absolute/path/to/executable as told by snowgamescope I belive supports it
[Desktop Entry]
Name=My App
Comment=Description of my App
Exec=/absolute/path/to/executable
Icon=/absolute/path/to/icon
Terminal=false
Type=Application
Categories=Game;