It's like classic Tic Tac Toe, but with a twist, you can play on a 3x3 to 18x18 board. This game includes settings (available at the bottom of the iPad settings panel). Settings include: Grid size, your/iPad's pieces, and difficulty levels. Yup, you can pick your pieces, you're not just stuck with the classic X's and O's. In fact, any key you can find on the iPad's keyboard, is a character that you can use! The difficulty levels include: Easy, Normal, Hard. Also Available on the iPhone: 6TacToe and XTacToe!