| 摘要 |
In a game device (200), a memory unit (201) stores a position of a player character, a position of an enemy character, an elapsed time up to a present time after the enemy character has appeared, and candidates of a position where a new enemy character is to appear. A measuring unit (202) measures an elapsed time up to a present time after the enemy character has appeared, and stores the measured elapsed time in the memory unit (201). A calculating unit (203) calculates a reference distance which becomes a determination criterion for a position where a new enemy character appears based on the stored elapsed time. The reference distance monotonically increases relative to the increasing of the elapsed time. An appearance setting unit (204) selects a candidate having a distance to the player character closest to the reference distance among the candidates stored in the memory unit (201), and causes a new enemy character to appear at the selected candidate position.
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