Also known as Mister Bubbles, Big Daddy is one of the many creatures that can be found in Bioshock. There are genetically enhanced humans that look like giant divers. Their main purpose is to protect Little Sister in the underwater city of Rapture.
Big Daddy has a huge dome for a head and a drill in place of one of his hands. The space inside the dome can be illuminated depending on if he’s feeling friendly (green), indifferent (yellow), or enraged (red).