The terms “games-based learning” and “serious games” are sometimes used synonymously; however games-based learning is really a subset/branch of serious games. Kaufman and Sauve (2010) define a serious game as “a mental contest, played with a computer in accordance with specific rules which uses entertainment to further government or corporate training, education, health, public policy and strategic communication objectives.” Tang, Hanneghan, and El Rhalibi (2009) generally define games-based learning as “an innovative learning approach derived from the use of computer games that possess educational value or different kinds of software applications that use games for learning and education purposes such as learning support, teaching enhancement, assessment and evaluation of learners.” Hainey et al. (2011a) discuss some of these previous definitions and others in more detail to provide a useful diagram to disentangle the terms surrounding games-based learning in the literature and show where games-based learning and serious games fit in relation to games, simulations, computer games, computer simulations, simulations games and computer simulations. The diagram is presented in Fig. 1.