Tic-Tac-Toe addict? It's an age old game that has been used to pass the time and it's now available on the Windows Marketplace for Mobile with a twist. XIM Inc. is offering TicTacToe 6x6 as a free application that not only has the traditional Tic-Tac-Toe game but also a version that uses a 6x6 grid.

The game board is drawn on a sandy beach where you can compete against your friends or the computer. The traditional 3x3 game goes quick and it's not long before your "ties" out number your "wins".  Enter the 6x6 grid.

With the 6x6 grid you have to line up horizontally, vertically, or diagonally four "X"'s or "O"'s. You definitely have to pay more attention to this version or your opponent will sneak up on you.

Graphics are well done, the application ran smoothly, and it's a great way to pass the time.  The application is free and the only catch is an advertising banner that spans the screen just below the playing field. It's not annoying and if it keeps the application free, it's worth the screen space.

If you're looking for a free, entertaining application to pass the time with, check out TicTacToe 6x6 over at the Marketplace.