Game featured in the movie "WarGames"

• Simple game
• Game in which crosses are used
• Game on a 3 x 3 grid (hyph.)
• Game that's hard to lose
• XXX activity
• Game that's the hidden theme of this puzzle
• Kids' game that usually ends in a draw
• Game that often ends in a tie

Wikipedia Word definitions in Wikipedia
redirect Tic-tac-toe