The present invention is directed to provide a game apparatus and a game program, which are capable of more strategically conducting a battle with an enemy character, deepening interest, winning a battle with a formidable enemy even without any level up, and enjoying a game that is rich in strategic feature. When an enemy character starts to attack a player character (step S11), time counting to set a chink occurrence flag starts. When an attack operation of the player character on the enemy character is received (step S12) and the attack hits the enemy character (step S13), it is determined whether or not a chink occurrence flag remains set on the enemy character (step S14). When the chink occurrence flag remains set (YES in step S14), a special effect is generated (step S15).