This dissertation analyzes representations of gender, sexualities, and international relations in the Mass Effect video game series through a feminist lens. The author argues that while Mass Effect challenges some stereotypes by including diverse characters, it also reinforces traditional norms. Specifically, the game subverts expectations by featuring in-depth female characters and relationships, but also sexualizes female characters and assimilates them into a masculine culture. The military themes promote realist views of international relations. Overall, Mass Effect illustrates both the potential and limitations of using science fiction to explore complex social and political issues through popular media.