Tetris

Available for over a year

In 1984 Tetris, one of the most popular computer games ever, was invented in Moscow. Chloe Hadjimatheou speaks to its creator, Alexey Pajitnov, and to Henk Rogers, an American businessman who helped bring Tetris to the world. This programme was first broadcast in 2011. PHOTO: Tetris being played on a mobile phone (Getty Images)