Although gamification has been applied to the e-government domain for the past 20 years, the literature shows that the field still lacks formal definitions to support the design of gamified strategies on these types of platforms and services, and that game element selection is often a subjective matter. This chapter provides a useful taxonomy of game elements to support the design of e-government initiatives, elaborated from the analysis of the literature on gamification frameworks and models applied to this domain. This work was additionally validated by gamification experts from public and private organizations during a series of workshops. A total of 30 commonly used game elements were selected, conceptualized, and classified into six dimensions. Gamification experts agreed that this work contributes to standardizing the game elements employed in e-government services, while the authors also believe this taxonomy can be a useful tool to analyze already existing frameworks.