Heroic Launcher absolutely lives up to its name, and should be installed on anything running SteamOS.

Why reboot your whole SteamOS handheld to desktop when you can visit the desktop from inside the gaming mode? Nested Desktop does have limitations (no file management, no Steam-within-Steam) but gosh ...

Why is nobody afraid of being locked-in to SteamOS? Does SteamOS allow you to play PC games purchased outside of Steam? Click to expand... Yes. Fundamentally, it's just a modified version of Arch ...