Arduboy is a tiny console (http://www.arduboy.com/) that is basically an Arduino Leonardo with a bright OLED screen, battery, buttons and speaker in a neat package. However, having little program space makes impossible to have a large collection of games, hence: the Dock.

The dock uses a Raspberry Pi Zero W inside to download all the games from my own repository:
http://arduboy.ried.cl/

The software is still unfinished. More info here:
https://community.arduboy.com/t/wip-arduboy-dock-3d-printed-dock-rpi/3809

Demo:
https://www.youtube.com/watch?v=zSWhooEPZko