This chapter analyses the government participation of the Nordic radical right parties. Why, for example, were most of the parties excluded from government cooperation for many years following their entry into their respective parliament? Why have some of the parties joined government coalitions as full cabinet members, while others have opted to remain parliamentary support parties? And why did two of the parties choose to leave the government in between elections? Drawing on theories of coalition formation, of party behaviour, and of mainstream-party reactions to the radical right, this chapter traces the transition of the Nordic radical right from opposition to power. The chapter shows that, although size and policy are factors of fundamental importance, we also need to consider party strategy if we are to explain the variation in government participation by radical right parties in the Nordic region.