A strange little side quest
Here is a rabbit hole for the next loading screen in Spot the Difference Mystic Mermaids: The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. And then there is this: Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. Not bad for a few facts hiding behind a Play button.