In this paper, we report on the structural nexus of one youth's gaming practices across contexts and over time. We utilize data from an ethnography of youth science and technology learning, as well as expertise development, across settings and developmental time. We use Ole Dreier's theory of persons to understand how this youth is able to develop considerable gaming expertise. Additionally, we explicate the learning practices embedded in the structural nexus of this youth's gaming and we examine associated issues of learning and identity. We problematize the lack of continuity between his formal schooling experiences and the structural nexus of his gaming practices as situated in a variety of other contexts and we reflect on the implications for the design of STEM gaming experiences in formal school environments.