The Adafruit Cupcade comes as a big kit with lots of parts including all electronic components, the laser cut case, power adapter, and a blank SD card (you'll need to burn the CupCade image on). You provide a Raspberry Pi model B (not included), a soldering iron, solder, wire, basic electronic hand tools, tape, etc. This kit has a lot of steps, so its best for people who have soldered before and even better, have a little Raspberry Pi/Linux hacking under their belt in case some configuration-file-editing is required. Give yourself a nice, long Saturday afternoon to put together (about 4-6 hours altogether).
Play memorable old arcade games, like Ms Pacman, Galaga, Donkey Kong, Arkanoid, DigDug, Gauntlet, etc but more advanced might be too slow even with overclocking the Pi. There are four buttons total, two next to the joystick for "fire" and "jump" and two in front for "coin" and "start". If you set up your Cupcade for 'horizontal' alignment, you can even run classic Famicom/Nintendo games at full speed. Tons of arcade games that may not emulate well are available in NES format, or just play some old familiar classics.
Hands-on by GEDDEM