I dont know if it is already supported but it doesnt show up! Forza Horizon 3, 4 would be nice as a game. I would also love to see the different Minecraft clients show up as Minecraft or even their own game. (most popular: Badlion Client, Labymod and Lunar Client).
Professor Domme
Curated games list has been removed due to removal of the Games panel. For profile syncing on program launch, any .exe can be added in Settings -> Profile Sync.