A strange little side quest
If Tariff Station: Protect the President 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. The broader history adds one more wrinkle. Gun Fight reached arcades in 1975 and became the first arcade video game to use a microprocessor. That history is one reason familiar mechanics can still feel new when they are recombined well.