Centaur is classic “Rich get Richer” Bally in multiball form. Fathom is classic Bally RGR but in rule form. Centaur requires you to keep MB going to score high, where Fathom is harder to get started, but more satisfying once you get it rocking and rolling. Between the two, I have more fun on Centaur so it is my Bally multiball dream pin from that period. The only Bally from that period of machines I like better are EBD and Space Invaders but only because they are single ball machines, and require way more skill to score high on.