cat

It's called the “Steam Deck”, despite the fact it's obviously been grilled.

“You know, this OS is quite similar to the ones they have at Arch Linux.”

“Oh ho ho ho no! Patented SteamOS™; old Valve recipe!”

……….KDE PLASMA IS WHAT THE STEAM DECK RUNS AS A WINDOWIBG SYSTEM UNDER THE HOOD

(edit: I straight up did not realize that @dog had explicitly mentioned this in her own comments already! Apologies for the posting gaffe)