the heroic launcher was recently updated to support gamescope (installed it through flatpak by installing org.freedesktop.Platform.VulkanLayer.gamescope 23.08 through the terminal using >flatpak install).
it can be configured with a simple GUI (as seen above) and gives you all the options you could reasonably need. One of the big improvements is that on wayland, unlike when used through steam, it will actually close the game when told to, without requiring you to maunally kill the gamescope process.
valve still requires you to edit text launch options to enable and configure gamescope.
Valve needs to do better with gamescope, this 3rd party FOSS app is embarrasing them.
Game scope is a micro-compositor, it’s how the Steamdeck handles games and probably steam. Basically the settings there, you can have the game in 1080p but upscaled by FSR/DLSS to 4k. The difference is that only the game is upscaled, not the whole system
Heroic is a launcher for Epic, Amazon, and GOG
Yes, it can be seen as an alternative to Bottles/Lutris but the stores and libraries are baked in
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Displaying stuff to the screen, the game will tell it “draw this”
If your library is in the other things then you can take advantage of the technology in those games