Quixo bears a superficial resemblance to Tic-Tac-Toe – with one player being crosses and the other circles, and with both
trying to create a line of their symbol – but that's where the
resemblance ends. The pieces in the game are cubes that have a circle on
one side, a cross on another, and blank faces on the other four; to set
up the game, players place the 25 cubes with blanks face-up on the 5x5
grid in the game board.
On a turn, the active player takes a cube that is blank or bearing
his symbol from the outer ring of the grid, rotates it so that it shows
his symbol (if needed), then adds it to the grid by pushing it into one
of the rows from which it was removed. Thus, a few pieces of the grid
change places each turn, and the cubes slowly go from blank to crosses
and circles. Play continues until someone forms an orthogonal or
diagonal line of five cubes bearing his symbol, with this person winning
the game.