Image processing device, group character movement control method, game device including group character movement control, game score computing method and recording medium

A game device including group character movement control is capable of carrying out the processing steps without increasing the processing load and without giving any sense of strangeness, such as dull movement, even when the number of characters to be moved and controlled in the virtual space increases. By grouping the sub characters and causing all of such grouped sub characters to move based on the same control point, the processing load is lightened in comparison to individually chasing the main character, it is possible to display more sub characters, and prevents defects such as slow game progress and partially deficient screen display. In addition, as it is possible to produce a sense of tension to the main character (player) of being chased by a group, the game amusement is enhanced thereby.