The "2021" designation means the operating system and the game list were curated and frozen in 2021. It typically includes systems up to the PlayStation 1, Nintendo 64, Sega Dreamcast, and often includes some PSP and Sega Saturn titles, depending on the hardware target.
Playing this build feels different from modern gaming. There are no battle passes, no day-one patches, and no microtransactions. You select Super Mario World , and you are playing in 4 seconds. batocera linux 200gb 15000 juegos 2021