A Course in Game Theory presents the main ideas of game theory at a levelsuitable for graduate students and advanced undergraduates, emphasizing the theory'sfoundations and interpretations of its basic concepts. The authors provide precisedefinitions and full proofs of results, sacrificing generalities and limiting thescope of the material in order to do so. The text is organized in four parts: strategic games, extensive games with perfect information, extensive games withimperfect information, and coalitional games. It includes over 100exercises.