Gomocu

The game is played by two players. The playing field is a regular piece of paper with little squares (often used in schools). The goal of the game is to create an uninterrupted line of X's or O's. The winning line can run vertically, horizontally, or diagonally. The first player to create a line of 5 symbols wins. In case you have never played this game before, you certainly should do it immediately!