Game software for raising interest on a card game by adding an unexpected element thereto without losing fun of thinking out a strategy. After determining an appearing face of a dice by a procedure of determining face in a turn for a player, a card attached to the determined face, which was selected from a hand by the player is determined as a battle card by a procedure of processing card battle. Offense/defense data of the battle card is read out so as to judge an outcome of the battle cards. The player is invited to freely select the card to be attached to each face of the dice from the hand, and the dice card corresponding to an appearing face is used as the battle card.