The book is divided into two parts that can be read independently one from the other. The first theoretical part (Chapters 1-3) recalls the primary concepts and tools of game theory. It integrates a number of examples of games that illustrate "simple" strategic deliberations that companies can experience when faced with various situations. The definitions of key concepts of game theory (equilibriums, caution, etc.) are presented in Appendices 1 and 2 and unfamiliar readers should refer to them to better understand basic concepts. The second part (Chapters 4-7) presents a number of case studies in a number of sectors. These studies are most often extracted from ongoing research studies reviewed and rewritten in a simpler game form.