Abstract: An image generation system includes a character control section, a virtual camera control section, an image generation section, and a motion mode switch section. The motion mode switch section switches a motion mode of a character from a free-move mode to a battle mode when an encounter event between the character and another character has occurred in the free-move mode, the free-move mode being a mode in which the character moves on a field in an object space, and the battle mode being a mode in which the character battles the other character. The character control section moves the character on the field in a direction indicated by direction instruction information from a direction instruction section of an operation section in the free-move mode, and causes the character to make a battle motion indicated by the direction instruction information from the direction instruction section in the battle mode.