SOS Game Classic is a puzzle game available on the App Store for iPhone users. Similar to tic tac toe or XOX, this game takes the concept to a more advanced level, requiring strategic thinking and attention. The best part? It's completely free!

The objective of SOS Game Classic is to achieve a high score, which will be published on the online leaderboard. The game is played in turns, and you can play against your iPhone device. From the top panel, you can easily keep track of whose turn it is.

When it's your turn, simply tap on a tile where you want to put a letter. You have the option to select either an S or O letter from the dialog. The goal is to complete an SOS vertically, horizontally, or diagonally. If you succeed, it's your turn again until you can no longer make an SOS. At that point, the other player takes their turn.

For each SOS you make, you earn 1 point. The player with the most SOS wins the game. Depending on your SOS series and combos, your final score will be calculated and sent to the online leaderboard if you are signed in to Game Center.

Challenge yourself and test your strategic skills with SOS Game Classic on your iPhone. Download it now and start playing!