Caro Online, Gomoku XO, Tic Tac Toe, also called Five in a Row, is an abstract strategy board game. It is traditionally played with X or O on a board.

The goal of the game is to order unbroken row of five signs horizontally, vertically, or diagonally. You play by tap on any empty field of the board. Then it is turn of Player 2. And then it is your turn again and so on.