Uses the AS-2518-45 "Cheap Squeak" sound board. We previously showed Greg Kmiec was the designer of this game. We showed a playfield drawing to Greg (not shown here) that was signed by George Christian and dated May 5, 1983. Greg told us:Although he did used a few of my ideas from previous games, George did design and draw "X's & O's" under the tutelage of Norm Clark.