A thousand games on a 5 1/4 on that holiest of relics, the Commodore 64. I would still be playing it today if I hadn't thought it was a good idea to play in a thunderstorm. Oh, the sparks they did fly. Lode Runner, River Raid, Agent USA, a million Pac-Man and Qbert clones, before cloning games was cool, and the great * 8. Or was it 8*... or... was it just *? Oh my god, don't let me lose my memories of the good life! ... when I was 5.
I don't remember HOW it worked, but I do remember having a little black cartridge I could plug in to make it easier to run games. Or perhaps to pirate games, I didn't know back then. If anything was made to cause pirating issues, it was that grey plastic box with the light blue screen.