Sand Blocks: Clear the Lines

A strange little side quest

If Sand Blocks: Clear the Lines 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. And the history keeps stacking up: Space Invaders, released in 1978, helped push video games into mainstream popular culture. The details change, but the appeal of learning a system and trying again is remarkably persistent.