The Game Genie was the technological holy grail of my Nintendo-playing childhood. Here was a device that would let me play Super Mario Bros. with infinite lives, or get infinite rockets in Metroid. Here's exactly how it worked, and how people are still using it today.
From the start, the Game Genie was marketed as a "game enhancer," though there's a fine line between "enhancing" and "cheating." In short, it was able to modify games at startup, so you could change them in ways that made... READ ON