Players engage in a head-to-head battle by placing discs in the innovative Triple Cross tower. Your aim is to have more vertical and diagonal "3-in-a-rows" than your opponent. Game play is unique in that players push a disc into the row from the side. If the push in another disc, the first disc played is moved up along the track. If a 3rd disc is played in the same row, the disc in the middle is dropped down one row - and if a 4th disc is placed the first disc played is popped out the side. There is subtle strategy in where to place the discs and when to use the blockers to lock a row. —description from the publisher