A game machine is provided that displays an attack direction in a 3D virtual game space when a player character is attacked, such that the human player can readily recognize the attack direction. In the game machine that activates the player character and an enemy character that attacks the player character in a 3D virtual game space, the direction of the attack received by the player character from the enemy character is acquired based on player position information indicating the position of the player character and enemy position information indicating the position of the enemy character in the game space. Damage marks which are objects that indicate the attack direction are generated at positions corresponding to the attack direction in a player region set around the player character, and at least a part of the game space, including the player character and the damage marks, is displayed.