You can build a classic game system for less than $100, and it's easier than you might think. Here's how to use an inexpensive Raspberry Pi board to play retro NES, SNES, Game Boy, Sega Genesis, ...
The $35 Raspberry Pi has made computing cheap again, and now budding game developers are being given the chance to recreate some classic games through a new Pi-focused book called Code the Classics.