Kevin started becoming interested in pinball machines, a hobby that I coincidentally shared, and one of his machines broke down. According to Kevin, the box was jam-packed with NES games. But at the end of the day, this was Super Mario Bros./Duck Hunt, one of the most common games ever produced. What I had found wasn’t just a box of pristine Super Mario Bros./Duck Hunt cartridges. What we had found was the very last production run, and an undiscovered variant of Super Mario Bros./Duck Hunt.