Created mostly as a learning project in 3D printed case building, it is totally functional. It includes every commercial game ever released (plus a few prototypes), complete with colour overlays. The controller is also DIY and functional, although very much not to scale.
I used an old Raspberry Pi 2, a WaveShare clone screen (no CRT, unfortunately) and an Arduino Pro Micro with a KY-023 joystick for the controller. My printer is an Ender 3 V2.