Non-zero-sum games are games in which outcomes need not sum to zero. With cooperation, both can win; with competition, both can lose. Non-zero-sum game is an interaction in which both participants can win or lose. Moreover, Non-zero-sum games are game in which players have some common interests; a gain by one player does not require that others lose. It means that "win-win" or "lose-lose" is possible in two-person games Non-zero-sum game is also called Mixed-motive situations.