Within Scrum, the retrospective is the principal means through which a team focuses on continuous process improvement. As such, retrospectives provide Scrum teams a method which will allow them to identify and resolve issues that impact team performance. However, it is hard to measure increased performance based on process improvements resulting from retrospectives. Through a series of semi-structured interviews with team members, Scrum Masters, Product Owners, and organizational leadership, the research will identify quantitative measures which can be used to evaluate the effectiveness of retrospectives. Subsequently, a new game-based retrospective will be developed incorporating game elements to help improve the effectiveness of retrospectives. Finally, an empirical experiment will be conducted to evaluate the quantitative measures as well as the effectiveness of the game-based retrospective.