Economics
Platform: Coursera, University of Tokyo
Level: Beginner
Looking for a short introduction to game theory? Then this course is perfect for you as it introduces you to the key fundamental ideas behind the key concepts of game theory (equilibrium, rationality, etc.). Furthermore, the course only takes 14 hours to complete. What are you still waiting for?
Here is the link to get started: https://www.coursera.org/learn/game-theory-introduction