The typical front end environment that you get stock standard on RetroPie is called Emulation Station. It visually manages your games and emulators using an application similar to that of KODI media center.
Emulation Station is fantastic too; it's got styleable interfaces for each emulator, you can have overlays on screens, controller config management is done extremely well.
Well user Floob over on the RetroPi forums decided he wanted to go a step further and make his owm front end to rule them all. He came up with Attract Mode and boy does it attract:
If you're sold on the idea of the Attract Mode visual setup for your retropie, find out more here.
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