This course is an introduction to game theory and a literature review of game theoretical approaches to the study of international conflict. Game theory is a tool for analyzing strategic interaction between rational actors. The course features games like the Prisoners' Dilemma, the Chicken, and the models of bargaining. Students learn how these and related tools can be used to understand and analyze historical and current instances of international conflict. Specifically, we try to answer questions like: why do states fight costly wars in international relations? Why do peaceful negotiations fail? How does deterrence work? Why do states get into costly arms races? How does domestic politics shape international conflict? The recorded lectures are from the Harvard Faculty of Arts and Sciences course Government 1729.