Provided herein is a card game involving two or more players that is intended to readily increase overall attack power and allows the players to get familiar with the game in a relatively short time and the game to be completed also in a relatively short time. The game is played by using the character (battle) cards. On the character (battle) card C16, an additional attack power indicator 27 is provided in addition to an attack power indicator 25. Also, on the playing face of the effect indication card is provided an indicator for additional attack power. During his or her turn, the player pays cost by turning the bomb (cost payment) card B. The player draws one card C16 from his or her deck and places it face up on the play field. Then, the player uses the additional attack power of the card C16 to deliver attack on the opposing player's character card C56 which the player has selected as a target, and inflicts damage on that target. The player whose predetermined points are reduced down to zero will lose the game.