To create BioShock 2's protagonist, the first Big Daddy ever created in Rapture, 2K Marin went through many prototypes to convey its unfinished feel. "The artists had to imagine what the very first Big Daddy would have on him -- this Big Daddy had to feel like he was a rough draft or a work-in-progress, an amalgam of Big Daddies to come," the developer explained.

2K Marin has posted several shots from its creation process for the character, similar to its overview of Big Sister's evolution. Above, you can see a "near final concept rendering" of the first Big Daddy. I've also included a couple previews of earlier drafts after the break: