How to play
3D Tic-Tac-Toe on a cube — short rules with pictures.
The board
Rooms use an N×N×N cube: 3×3×3, 4×4×4, or 5×5×5. Cells are stacked in layers — think of several classic boards glued into one volume.
Your mark
Up to four players can share a room. Each seat has a shape:
- TicFirst seat
- ToeSecond seat
- TriangleThird seat
- SquareFourth seat
How to win
Get win length of your marks in a straight line. Win length is chosen when the room is created (from 3 up to the grid size). Lines can run along an axis, across a face diagonal, or through the cube on a space diagonal.
Cube vs flat view
Cube (3D) is available for classic 3×3×3 — rotate the board and click cells in space. Larger grids (4×4×4 and 5×5×5) use Flat (2D): each layer is shown as its own plane so every cell stays easy to tap.
Turns & timer
Players alternate. The HUD shows your mark and whose turn it is. Each room sets a turn timer — if time runs out, the turn may be forfeited. Guests can play free rooms; coin-stake rooms need a registered account with enough coins.
Quick tips
- Control the center on odd grids when you can — it sits on many lines.
- Watch face and space diagonals; they are easy to miss in flat view.
- Private rooms and friend invites keep matches among people you know.
- Wins and losses update Elo and match stats for registered players.