"a game can be studied in the repeated game context where the repeating can help to facilitate cooperation in a context otherwise unfavorable. This is like when cooperation can be found to be quite stable in a repeated prisoner's dilemma game."
https://web.math.princeton.edu/jfnj/texts_and_graphics/Main.Content/AGENCIES_and_COOPERATIVE_GAMES/Archives.and.Prior.Communications/Archives/Older.Nov.2004/Older.texts/3PERSON.older/outlin32.txt