RetroPie turns a Raspberry Pi into a retro-gaming machine and server, which can be configured to play your favorite arcade, home-console, and classic PC games. RetroPie provides emulators for various gaming platforms, such as, Nintendo, Gameboy, PlayStation, Atari and many others.
I built two versions.
One is a wall-mounted arcade cabinet
The other is attached to my home theater system and uses a wireless gamepad as a controller: Movie Theater RetroPi
I bought a Fastoe Retropie with RetroPi and 10,000 games. I reduced the 10,000 down to 250. Here is how I did it.