5x5x5 3D Tic Tac Toe (Noughts & Crosses) is a highly challenging classic board game that will stimulate your mind and exercise your visual spatial perception. Play against the computer (there are two levels of challenge difficulty) or another human opponent. The game board real estate consists of five (5) stacked game boards with 25 squares per board for a total of 125 squares. Your objective is to create a winning combination before your opponent does so by using the mouse to mark five (5) squares to form a row with your Color or Token in any direction (up, down, across, or diagonally) on any one game board or by spanning all five (5) boards while alternating playing turns with your opponent. Game play is both fun and intuitive. Special features like a real-time list of squares sorted by number of winnable combinations and a visual method (via a mouse right-click on playing square) allow you to inspect any one playing square's possibilities to help you strategize against your opponent and win the match. Add variety and increase level of difficulty by excluding randomly selected playing squares as non-playable. The Undo playing move or the Undo match Win features allow you to try out "what-if" scenarios against your opponent exhaustively. View the playing boards using one of the four (4) different and selectable view modes that range from solid to transparent. Rotate the playing boards horizontally up to 360 degrees and/or adjust the vertical angle to your viewing preference. Game features are user customizable and your settings are memorized across game sessions. Your game sessions can be optionally recorded to a plain text file that records all match moves and provides a summary. Create player and game board component customized Color sets and alpha-numeric text based player Tokens and Screen Names. Save, reload and replay all your 3D Tic Tac Toe matches easily. Resume play of saved unfinished matches later at the point where you left off.