Brian Sullivan is a computer game designer and entrepreneur known for developing Titan Quest and the Age of Empires series of games.^[1][2] He is also the co-founder of Iron Lore Entertainment and Ensemble Studios.^[1][2] Sullivan won the 1998 Computer Game Developers Association (GDC) Spotlight Award for Achievement in Game Design for his work on Age of Empires.^{[citation needed]}

In addition to his work in the video game industry, Sullivan has also worked as a professor at Northeastern University, teaching a number of design courses.^{[citation needed]}

Sullivan graduated from Carnegie Mellon University.^{[citation needed]}