A strange little side quest
A small trivia drop for XoXo Classic: Alexey Pajitnov created Tetris in 1984 after drawing inspiration from pentomino puzzles, then simplified the idea around shapes made from four squares. That old idea kept changing rather than disappearing. Pong was field-tested in California bars in 1972 and helped launch the modern arcade-game era. Not bad for a few facts hiding behind a Play button.