This paper describes the design and development process used to create Alien Rescue, a multimedia-enhanced learning environment that supports problem-based learning (PBL) in middle school science. The goal of the project is to further our understandings of technology, pedagogy, and instructional theories as they relate to the application of PBL within middle school classrooms through the application of design-based research. A unique characteristic of the project is that it is developed entirely by a team of graduate learning technologies students, working under the direction and supervision of the faculty. Throughout the development process, graduate student developers learn steps and strategies for designing immersive learning environments, engage in technology development, and conduct research that informs future design iterations. Key features of the development model are described in detail and developers' reflections are shared. Recommendations for those interested in engaging similar endeavors are provided.