Mensa Select Winner. Quixo is similar 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. Play with two players or in teams of two. Your aim is to line up 5 cubes in a row, pushing your lines of cubes horizontally or vertically.