This course offers an in-depth analysis of game theory and its advanced applications in fin-tech related fields. First, it covers theoretical foundations, including extensive form game, strategic form game, Nash Equilibrium and its existence, backward induction, games of incomplete information, sub-game perfection, Bayesian Nash equilibrium, sequential equilibrium. Second, it covers mechanism design, including non-linear pricing, dominant strategy mechanism, Bayesian mechanism design, robust mechanism design, and dynamic mechanism design. The course fosters a deep understanding of game theory, equipping students with advanced tools to engage in independent research, and contribute to the development of novel financial technologies.