A strange little side quest
Even a quick game like Mahjong Titans sits on top of decades — and sometimes centuries — of ideas. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. A second detail makes the picture even better: 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.