: Secure all internal components inside the 3D-printed shell using screws.

: A custom gamepad PCB with tactile buttons and a silicone keypad.

: You will need to solder the buttons to the custom PCB and connect the screen and power board to the Raspberry Pi.

: A 3D-printed enclosure, which is often the most customizable "piece" of the build. How to Produce One If you are looking to build this project from scratch:

: A PowerBoost 1000 Charger and a 2000mAh or larger lithium-ion polymer battery.

: Install RetroPie on a microSD card to act as the operating system for gaming.

: Download the STL files (usually from Thingiverse ) and print the front and back shells.

To "produce" or assemble one of these units, you typically need several specialized parts often found at retailers like Adafruit : : Uses a Raspberry Pi 2 or 3 for processing. Display : A 2.8" PiTFT capacitive or resistive touchscreen. Audio : A small speaker and a class D audio amplifier.