The M.E.S.A.D.G. is designed to examine the relationship between technology, obesity and environmental awareness by means of a mobile digital game that combines geocaching, social networking, and biofeedback. As there is a clear correlation between ”screen time” and obesity, and between the consumption of digital technology and an environmental degradation, this project aims to develop a “disruptive computing” application for adolescents that will enhance their physical fitness, encourage them to explore the built environment, and develop environmental awareness. The M.E.S.A.D.G. utilizes biofeedback mechanisms (such as heart rate monitors) to prompt users into a geocaching exercise; users then share their experiences with others via social networking sites. Thus, users are engaged in a digital game which requires active and critical, rather than sedentary and uncritical, participation.