Goal: Get 3 of your symbols in a row: across, down, or diagonal - before your opponent does. How to play: - One player is X, the other is O. - Take turns clicking an empty square. - The status bar tells you whose turn it is. Wait when it says "Waiting for opponent." Win: Three in a row. A green line will draw across your win. Draw: All 9 squares filled with no winner. Tip: Take the center square first if you can — it's part of the most winning lines.