Tetris, the classic computer game in which players rotate a series of falling block shapes to make them interlock at the bottom of the screen, celebrates its 25th anniversary this week
The game was created by a 29-year-old Russian programmer called Alexey Pajitnov, who said he knew he had devised a hit game when he could not stop playing it. Now, a quarter of a century later, the game has sold more than 70 million copies around the world and is still going strong
It is, or has been, available on almost every gaming platform, including Amiga, Amstrad CPC, Apple IIgs, Atari ST, Commodore 64, NES, WonderSwan Color, and the ZX Spectrum but despite that Mr Pajitnov made little money from the game until 1996 when the rights to it reverted to him from the Soviet state
