GameScope
(Project Page: GameScope)
(in Game Menu and Game Config)
Set USEGAMESCOPE to 1 to automatically start GameScope when the game starts, either per game or globally.
The commandline arguments used (GAMESCOPE_ARGS) can be configured both per game and globally as well.
GameScope can be easily configured (and enabled) with the built in GameScope Gui, which can be found as Extra Button in the Main Menu
