Abstract: A game executing unit 31 instructs a player character's image data generating unit 32 to display a display position of a player character. A background's image data generating unit 37 generates background's image data for displaying a background's image of a game space consisting of a floor and walls as a bird's-eye view. A player character's position specifying unit 34 checks whether the display position of the player character is hidden behind the wall or the floor in the background's image of the game space. An image synthesizing unit 38 synthesizes the image data of the player character with the background image of the game space. When the player character position specifying unit 34 determines that the display position of the player character is hidden behind the wall or the floor, the image synthesizing unit 38 modifies the image data so that the wall or the floor concealing the player character is made semitransparent and the rear thereof is displayed.

Abstract: A game executing unit 31 instructs a player character's image data generating unit 32 to display a display position of a player character. A background's image data generating unit 37 generates background's image data for displaying a background's image of a game space consisting of a floor and walls as a bird's-eye view: A player character's position specifying unit 34 checks whether the display position of the player character is hidden behind the wall or the floor in the background's image of the game space. An image synthesizing unit 38 synthesizes the image data of the player character with the background image of the game space. When the player character position specifying unit 34 determines that the display position of the player character is hidden behind the wall or the floor, the image synthesizing unit 38 modifies the image data so that the wall or the floor concealing the player character is made semitransparent and the rear thereof is displayed.