Specification of an attack for a player character is received by means of an attack specifying operation of the player. A direct attack reaction is determined in the case where it is determined that the attack hits an enemy character A. The direct attack reaction indicates a reaction of the direct attack target character that suffers the direct attack. The enemy character A is then caused to execute the determined direct attack reaction. In the case where it is determined that an indirect attack to be caused by contact between the enemy characters A, B hits an enemy character B when the enemy character A executes the direct attack reaction, an indirect attack reaction indicating a reaction of the enemy character B that suffers the indirect attack is determined. The enemy character B is then caused to execute the determined indirect attack reaction.