The information processing device relating to the present invention configures, in association with a stage where each of a plurality of players can engage in battle play, a player character owned by the player as a support character that provides support in a stage where another player engages in battle play, generates a game screen displaying a list view of support characters associated with the selected stage once a first player among the plurality of players performs an operation to select a stage, directs the selected support character and a player character belonging to the first player to engage in battle with an enemy character configured in the selected stage once the first player performs an operation to select a support character from the list, and provides benefits to a second player, from among the plurality of players, who owns the selected support character.