Serious games and educational simulations are an unique product category with functional requirements that are different from platform and casual games, MMOGs, and drillâ€“n-skill learning games. The gameplay itself is only the tip of the iceberg: hidden out of sight is an engine the player doesnâ€™t see. As an emerging market, however, little has been written about the best engines for building serious games. This lack of transparency makes it difficult for publishers to choose development partners, and for developers to scope new projects. My article “Serious Game Engine Shootout: a comparative analysis of technology for serious game development” and panel discussion on March 6th at the Serious Games Summit is intended to help address this deficiency.