A strange little side quest
A little context makes Pengo more fun to place on the gaming map. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. The same trail leads to another fact: Pac-Man went on sale in 1980, and its creator Toru Iwatani famously linked the character's shape to a pizza with a slice missing. It is a good reminder that simple game mechanics can carry a surprising amount of history.