The game couldn't be simpler. One of seven shapes falls from the sky. As the "Tetrimino" inches down the screen, the player rotates it and moves it into place among other similar objects. Build a horizontal line across the board and the entire thing vanishes. Create four lines at once, and they all disappear as the gamer earns massive points. Rotate, drop, explode. Rinse, wash, repeat. Again. And again. And again. A simple and repetitive task, but one that's beautiful when performed correctly.

Tetris, created in the mid-1980s by a Russian computer engineer and marketed to the world with the help of an affable Netherlands-born, New York-bred, Hawaii-based video game designer, is arguably the most recognizable computer game on the planet. Hundreds of millions of copies exist on every platform from ancient PCs and NES consoles to smartphones and Facebook. Tetris can be played in 50 languages and 185 countries, spanning roughly 95% of the world.