Abstract: A rule (applied to a battle) is set according to a stage of the progress of a game every time the stage of the game advances. When a battle is started, either a player character or an enemy character that can execute an action is determined. When it is decided that the player character can execute the action, a player selects the action of the player character. When the action selected by the player is against a rule, a rule violation is recorded. When the result of the action of the player character is also against a rule, a rule violation is recorded. When the rule violation is recorded, a predetermined penalty is imposed on the player after the battle ends.

Abstract: Multiple shops exist in a virtual space of a game. Each shop belongs to any one of multiple unions. When a player character buys or sells a game item at any of the shops, a power point value of the union to which the shop belongs is increased according to the sales amount. The higher the power rank of the union to which the shop belongs becomes, the more the types of sellable and buyable game items are increased. The higher the power rank of the union to which the shop belongs becomes, the more cheaply the player can buy the game item and the higher the amount the player can sell the game item. The higher the power rank of the union where the shop belongs becomes, the more points that are given to a point card according to the buying or selling of the game items.

Abstract: A rule (applied to a battle) is set according to a stage of the progress of a game every time the stage of the game advances. When a battle is started, either a player character or an enemy character that can execute an action is determined. When it is decided that the player character can execute the action, a player selects the action of the player character. When the action selected by the player is against a rule, a rule violation is recorded. When the result of the action of the player character is also against a rule, a rule violation is recorded. When the rule violation is recorded, a predetermined penalty is imposed on the player after the battle ends.