Noughts and Crosses is the classic pen-and-paper game. It also goes by the name of Tic-Tac-Toe. The object is to place three noughts (O) or three crosses (X) in a line. The line can be across, down or diagonal. The player who gets a line of three first wins. If all the squares have been completed and no line of three has been achieved, then the game is a draw.