 Topics discussed in this section are less standard in the literature than those of the sections before. In an orthodox reading, various of the aspects addressed would not be considered part of game theory proper. The extended agenda followed here has been embraced by van Benthem, Pacuit, and Roy (2011) as a larger program for logic, going under the heading ‘Theory of Play’. The underlying line of reasoning is that games do not fully determine their outcomes, as they allow for various styles of play. Hence, it might be the process of play itself, including players’ types and how they change over time, that might the best focus for understanding interaction, rather than mere games or game forms alone. Similar lines of argument can be found in the foundations of computation where it has been proposed that the essential topic of study should be behavior (Abramsky 2008).