Abstract: The program stored in the non-transitory computer readable media causes the information processing device to execute a setting processing in which one or more parameters are set with respect to game content appearing in a game, and execute a simulation processing related to a predetermined battle game part using the game content, for which the one or more parameters are set by the setting processing, and user data that includes information on one of more of the game content set by the user playing the game, wherein optimal solutions for the one or more parameters are derived by repeatedly executing the simulation processing while changing (adjusting) the one or more parameters by the setting processing by way of an optimization problem that minimizes the difference between evaluation information retrieved based on the execution of the simulation process and target evaluation information.