Believe it or not but one of id Software’s earliest projects was to remake Nintendo’s hugely popular Super Mario Bros 3 for the PC. Although this was anything but a commission from the gaming giant in Japan, John Romero attempted to get Nintendo to license the game for release, only to find they wanted to keep it as a console exclusive. Despite being a widely known story within the gaming world, it’s only as of now we’re getting to see this technical demo.