A strange little side quest
If Tangle Puzzle sends you down a curiosity rabbit hole, start here. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. A second detail makes the picture even better: 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 screen is modern; the urge to test skill, pattern and timing definitely is not.