Digital games are marketed, mass-produced, and consumed by an increasing number of people and the game industry is only expected to grow. In response, postsecondary institutions in the UK and the U.S. have started to create game degree programs. Though curriculum theorists provide insight into the process of creating a new program, no formal research contextualizes curriculum planning for game degree programs. The purpose of this research was to explore these processes when planning undergraduate game degree programs. The research methodology included an explanatory mixed-methods approach, using a quantitative survey of participants in the UK and the U.S., followed by interviews with several participants selected on the basis of their institution's demographics. Results indicate that five external factors influence the development of game programs (government, industry, other universities, society, and trade associations) and eight internal factors influence curriculum planning (facilities, faculty, institution, interdisciplinary collaboration, learners, learning time and space, originating department, and backgrounds of the planners). Results also indicate that while some differences exist in the game degree programs across countries, the vast majority of curriculum planning processes and influencing factors are the same. The study concludes with a set of recommendations for educators, trade associations, and the games industry to improve game degree programs. (Contains 2 figures and 25 tables.)