Game jams are accelerated game creation events usually taking place over the course of a short time period. A variety of learning outcomes from game jamming has been discussed in previous research, with learning being a common motivation for attending game jams. Despite this, there has been little research into the psychological mechanisms driving learning and participation. In this article, the learning experiences of four first-time participants in the Global Game Jam are examined through self-determination theory. Results suggest that a wide spectrum of learning is experienced during a game jam, and game jams offer at least a temporary heightened sense of creativity and competence. Assessment remains an issue, however, and learning benefits may be contingent on the jam setting. All three basic psychological needs listed in self-determination theory are potentially fulfilled by game jam attendance, suggesting the relevance of self-determination theory in further jam research.