Connect 4

An enjoyable classic that everyone knows.

Connect four. A boardgame that is not played on a board. If someone hasn't heard of this, then they live under a rock. Or died before 1974.

Tetris

One game is known around the world for its addictiveness . . . Tetris.

Have you ever played tetris? Of course you have! Everybody has. Just fit the tetriminos together to form a line. If you get four lines on top of each other, you get a tetris.