A game system includes an input receiving unit (71) that receives input by a player, an operated character changing unit (722) that changes an object to be assigned as an operated object that is operated in response to the input received with the input receiving unit (71) among objects in a virtual space between a PC and an NPC, and an NPC control unit (723) that controls the NPC using a first control method while the NPC is not assigned as the operated object. During a period until a predetermined condition is satisfied after an object to serve as the operated object is changed from the NPC to the PC by the operated character changing unit (722), the NPC control unit (723) controls the NPC using a second control method different from the first control method.