 A (normal-form) game is a mathematical description of the relation between a set of individuals (or groups of individuals) and a set of potential outcomes. Individuals choose, independently and concurrently, a subset of the outcomes, with the final outcome being selected from the combination of each choice. Independently means that individuals’ choices do not influence one another. Concurrently means that each individual’s choices are taken not knowing the other players’ choices. Each individual is assumed to have a preference over the set of outcomes, i.e., he or she likes some outcomes more than others, and typically assumed to know the other individuals’ potential choices and preferences, adjusting their decisions accordingly.