1) Board game 2) Noughts and crosses 3) Pencil and paper game 4) Pencil game 5) Ticktacktoo 1) Crisscross 2) Ticktacktoo 
(from the article `number game`) Well known, but by no means as trivial, are games for two players, such as Ticktacktoe and its more sophisticated variations, one of which calls for ...
[n] - a game in which two players alternately put crosses and circles in one of the compartments of a 3-by-3 board
ticktacktoo noun a game in which two players alternately put crosses and circles in one of the compartments of a square grid of nine spaces; the object is to get a row of three crosses or three circles before the opponent does