摘要:
A first game character control section controls the action of a first game character which is an operation target for a user, based on an operation carried out by the user. A second game character control section controls the action of one or more second game characters, based on the action control data. In a case where a chat message is input in any game device, addressed to one or more users of one or more other game devices, an action control data changing section changes the action control data, based on the chat message.