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The classic paper-and-pencil game, also known as Tic-Tac-Toe, Noughts and Crosses or Xs and Os.

Features:
- lots of game modes (the classic 3x3. the 3D version 3x3x3 and other variants)
- 3 difficulties (easy, medium and hard)
- single player, two players on the same device, two players online
- google play games achievements, leaderboards and challenges

Rules:
- the board can be 3x3, 3x3x3, 5x5 or 7x7
- two players play alternatively, marking one empty cell at a time
- the objective (equal to 3, 4 or 5) is the number of markings to achieve in line (horizontally or vertically or diagonally)
- the 3x3x3 should be visualized as a cube (check the screenshots for some winning possibilities)

Stop wasting paper and save some trees! =)

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