RetroDECK brings an environment to catalog and play your retro games directly from SteamOS and it's tailored specifically for the Steam Deck.
It's inspired by embedded emulation systems like AmberELEC, EmuELEC, CoreELEC, Lakka, and Batocera.
Powered by EmulationStation Desktop Edition, which uses RetroArch and other standalone emulators to allow you to import and play your favorite retro (and even not-so-retro) games in a tidy environment without flooding your Steam library.
No other software is needed as everything it's already included!