Andrew Ryan is a fictional character and an important villain from the video game "BioShock." He is the creator of Rapture, the city where "BioShock" takes place. He is based on the real-life author Ayn Rand. Like Ayn Rand, Andrew Ryan is an atheist and an objectivist. Objectivism is the belief that everything people do should only be done if it helps their own self-interest. Andrew Ryan hates people whom he calls "parasites", or people who take away the money or the goods that other people worked hard to make.