Great ideas seldom disappear.

Tetris, a puzzle game invented in 1984 by Alexey Pajitnov is arguably one of the best video games ever created. It is based on a remarkably simple idea but provides a pleasant yet challenging gameplay experience. Despite having so many modern high-end games with realistic graphics and sounds at the present, Tetris is still widely played and enjoyed around the world. According to wikipedia, research has shown that playing tetris contributes to efficient cognitive functioning. 

Here is a sample of the famous game. It is a true classic.