A strange little side quest
Here is a rabbit hole for the next loading screen in Fireboy And Watergirl Light Temple: Street Fighter II, released in 1991, turned head-to-head arcade fighting into a worldwide phenomenon and helped define the modern fighting-game genre. The surprising part is how quickly the next milestone followed. 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.