Tic Tac Toe is a classic paper-and-pencil game played between two players, traditionally referred to as "X" and "O". The game is played on a 3x3 grid, and the objective is to be the first player to form a horizontal, vertical, or diagonal line of three of their marks. Here's a brief overview of how the game is played: Setup: Draw a 3x3 grid on a piece of paper or use a tic tac toe board. Players decide who will be "X" and who will be "O". Taking Turns: Players take turns placing their mark ("X" or "O") in an empty cell of the grid. The first player typically starts by placing their mark in any empty cell. Winning: The game continues until one player forms a line of three of their marks either horizontally, vertically, or diagonally. When a player achieves this, they win the game. If all cells are filled and no player has formed a winning line, the game is a draw.