A strange little side quest
If Solitaire: The Eternal Deck sends you down a curiosity rabbit hole, start here. Nintendo's Donkey Kong arrived in 1981 and introduced the character first known as Jumpman, who later became Mario. And the history keeps stacking up: In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. Not bad for a few facts hiding behind a Play button.