Unlike other Bally electronic pinball games, their documentation for this game shows the model number only as 1239, not 1239-E. Designer Jim Patla said that 'Centaur' was inspired by the classic Bally's 1956 'Balls-A-Poppin' and that Irv Grabel designed the multiball mechanism on this game. Uses a "Say it Again" reverb card in addition to the "Squawk and Talk" speech card.