A strange little side quest
There is a neat bit of history hiding behind the kind of play you find in Ultimate Merge of 10. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. The timeline takes another interesting turn: Computer Space reached arcades in 1971 and became one of the earliest commercial electronic arcade games, even though its controls proved demanding for many players. The details change, but the appeal of learning a system and trying again is remarkably persistent.
