Book excerpt: The book provides a systemic view of the state-of-the- art of Digital Game Based Learning (DGBL) across the lifespan, from age-specific game design requirements to technological devices that could overcome child and older adult difficulties in the use of DGBL technologies. Other topics include cross-generational digital game-based learning, workplace gaming, exergaming, serious games to tackle societal challenges,and implications of DGBL across the lifespan for game designers. In addition to the state-of-the-art methodologies provided for age-specific gamedesign, development, implementation and assessment, a significant portion of the book focuses on case studies where DGBL have been designed and implemented in every age groups and in cross-generational situations.