Cube Four

Three-dimensional tic-tac-toe with a twist: chase four in a row through a 4x4x4 cube, where lines hide in diagonals you can barely see — and you can rotate a layer once to wreck them.

How to play

The cube is shown as four stacked 4x4 layers side by side. Players alternate placing their mark in an empty cell. The goal is four of your marks in a straight line anywhere in the cube — there are 76 possible winning lines.

• Lines run within a layer, straight up the stack, or along any 3D diagonal.
• Once per game you may spend your whole turn to rotate one 4x4 layer 90 degrees.
• A rotation shifts every line passing through that layer — use it to break a threat or build your own.
• Fill the cube with no four-in-a-row and the game is a draw.

Controls

• Desktop: click an empty cell to place; click 'Rotate a layer', then a layer's spin arrow to turn it.
• Phone & tablet: tap a cell to place and tap the rotate button then an arrow to spin a layer.

Game modes

• Solo vs CPU at Easy, Medium or Hard, playing X or O.
• 2-player hotseat on one device.
• Online via invite, code or quick-match.

Tips & strategy

• The space diagonals through the cube's core are the easiest threats to miss — both to make and to block.
• Hold your one rotation in reserve; spending it to shatter an opponent's near-complete line is often worth more than a single placement.

About Cube Four

Cube Four reimagines three-dimensional noughts-and-crosses as an original, free browser game, adding a once-per-game layer rotation, three CPU strengths, hotseat and online play.

A free, original browser game on PlayPendium — no download, no install. Browse all games →