The Job Game Designer is a very broad field. There is Game developer, programmer, designer, tester.There are many skills needed for each one. I'm unsure which i would like to be, but I would work hard for any one. Lots of companies looking for game designers, look for people who worked on a group game in college. This shows team work and the ability to work with other people.
Game theory is a study of strategic decision making. Specifically, it is "the study of mathematical models of conflict and cooperation between intelligent rational decision-makers".[7] An alternative term suggested "as a more descriptive name for the discipline" is interactive decision theory.[8] The subject first addressed zero-sum games, such that one person's gains exactly equal net losses of the other participant or participants.[9]Today, however, game theory applies to a wide range of behavioral relations, and has developed into an umbrella term for the logical side of decision science.
The games studied in game theory are well-defined mathematical objects. To be fully defined, a game must specify the following elements: the players of the game, the information and actions available to each player at each decision point, and the payoffs for each outcome. (Rasmusen refers to these four "essential elements" by the acronym "PAPI".)[10] A game theorist typically uses these elements, along with a solution concept of their choosing, to deduce a set of equilibrium strategies for each player such that, when these strategies are employed, no player can profit by unilaterally deviating from their strategy. These equilibrium strategies determine an equilibrium to the game—a stable state in which either one outcome occurs or a set of outcomes occur with known probability.--- from Wikipedia.com