This program sets up a two-player, multi-decision matrix game, which allows asymmetries. Pairings may be fixed (same in all periods) or randomly reconfigured after each round. You specify the number of rounds, numerical values of decisions or text names of decisions, and each player's payoffs for each of the possible outcomes. With large numbers of decisions, it is convenient to use some standard payoff formulas that permit linear, quadratic, and min/max structures. For example, payoffs can be set to correspond to matrix-game versions of Cournot or Minimum-effort Coordination Games; these two games are implemented by the default setup parameters.