X vs O is a traditional puzzle game which often is played on notebooks and school desks. However, nowadays, you can play this game on your computer, laptop, and mobile. To start X vs O game, you can choose 1 in 2 modes: 3x3 or 5x5. Try your best to put 3 signs X or O in a row, a column or cross-line with 3x3 mode or 5 signs with 5x5 mode. Especially, use all your skills to give smart tips and finish each level in the shortest time. Are you ready to conquer this game now? Have a great time!