The Tic Tac Toe World Championship app allows you to play multiplayer or single player matches of Tic Tac Toe right on your Mac. Features: -Play turn-based multiplayer matches with others on iOS and macOS with this app. -Play "Single Player" matches of Tic Tac Toe against the computer. -Play in "Pass and Play" mode against a friend in the same room. -Game Center leaderboards and achievements are enabled.