The Expressive Intelligence Studio at University of California, Santa Cruz is dedicated to exploring the intersection of artificial intelligence, art and design. Our goal is to create compelling new forms of interactive art and entertainment that provide deeply autonomous, generative and dynamic responses to interaction. A major thrust of this work is advanced AI for videogames. This includes autonomous characters, interactive storytelling, automated game asset generation, game data analysis, and intelligent support for game design. By viewing AI as an expressive medium, our work raises and answers new and interesting AI research questions while pushing the boundaries of the conceivable and possible in interactive experiences.