What favorite sport helped give Tetris its name?

The favorite sport that helped give Tetris its name was tennis.

Alexey Pajitnov created Tetris in the Soviet Union in the mid-1980s. The title combines “tetra,” the Greek-derived prefix meaning four, with “tennis,” Pajitnov's favorite sport. The first part refers to the game's pieces, known as tetrominoes, which each contain four connected square blocks.

Pajitnov initially developed the game on an Elektronika 60 computer. Its central idea was simple but compelling: arrange falling four-block pieces to complete horizontal lines, causing those lines to disappear. The name therefore reflects both the game's mathematical building blocks and a personal detail about its creator.

A common mistake is to assume Tetris is derived entirely from “tetra” or from “tetrimino,” the trademarked spelling used by The Tetris Company. “Tetris” is instead a deliberate blend of the four-block reference and tennis. The game became internationally famous after versions for personal computers, the Nintendo Entertainment System, and Game Boy spread during the late 1980s.