Have you ever played Tic-Tac-Toe, Monopoly, Chess, Rock/Scissors/Paper? What’s the game theory behind the game you are playing? We all use game theory EVERYDAY! Zero-sum Games are win or lose, Non-zero Sum Games are games where you can earn property and not necessarily lose. Sequential Theory, Complexity vs. Depth in game development, Monty Hall theory and the Prisoner’s Dilemma are just some of the other terms we have learned, as well. We’ve furrowed our brows to figure out the probability behind curtain number 1 or curtain number 2. Should you stay with your choice or choose another? Are you more likely to win if you compete or cooperate? We’re not telling. We’re too busy playing!