Tell me more about the Little Sisters. What was their original concept and how did they change into being what they are today?

What’s interesting is that they were always there conceptually as a design but not story standpoint. First notion we had in creating BioShock was to have a different AI. We had just done cool AI in SWAT 4 and we didn’t want to do it again the same way, so we thought about what was new in AI and non-standard in shooters. One thing that struck me watching a nature show one night was the relationship between the hunter and the hunted, and I started thinking about AIs that had this kind of relationship in the game. And then we took it one step further and thought about the soldier ant that protected the defenseless resource gatherer. And it went from there. Then, we wanted to have more than a utilitarian relationship, but also have an emotional relationship, which had never been done in a shooter. And the most visual and understandable relationship was a twisted father-daughter, parent-child relationship. So we needed something that appeared to be childlike and then the hyper-realized father figure, that was the Big Daddy.