A game processing server apparatus includes a unit that delivers game information to a player terminal; a unit that delivers information regarding a single base game content and information regarding one or more material game contents selected from the plurality of game contents to the player terminal, the information including information indicating that the one or more material game contents are selected as the material game contents as an initial value; and a unit that accepts information regarding whether the one or more material game contents are selected as the actual material game contents by the player from the player terminal, treats the material game contents selected by the player to be not possessed by the player anymore, and updates the parameter of the base game content.