Hit the sentinel head multiple times for multiball
Don't be too afraid of the challenging modes - Genosha Under Siege and Fiery Assault aren't too difficult and can score consistently high amounts compared to the easier modes.
(0.91) A Fiery Assault is recommended as the first mode of the game. Completing "The Future" afterwards allows all sentinel multiballs for the rest of the game to be extended if all balls drain.
