X Versus O

A classic tic-tac-toe game that you can play against friends using Game Center, or locally on your device against another player or an AI.
Features:
• Play multiple Game Center matches at once.
• Close the game. It's okay. You can use other apps while staying in Game Center matches.
• Enjoy local multiplayer or single-player modes against an AI.
• Three AI difficulty levels: Easy, Medium, and Hard.
• Leaderboards and Achievements.
• It's free [there are ads];
Requirements:
• Game Center is needed for online play.
Note: If you don’t have any Game Center friends, you can use Auto-Match to find someone random to play with.