RetroPie also supports numerous joysticks and controllers. When you first run Emula-
tionStation and it detects a game controller, it will launch a setup screen. This will allow
you to configure your controller for the menu.
After your controller is configured, you will be at the menu screen, where you can select
your system and game to be played.
When you first get to the menu, you will notice that it has few options available. This is
because EmulationStation does not display emulators that do not have any game files
available. Once you copy a ROM over, the system will appear.