A new game control method which makes use of the characteristics of a
social network game and a
server device are provided. It is so configured that registered users have different items depending on their registered groups; connections with other users which are the characteristics of the
social network game are achieved in a fighting game; and the timings of communication between the
server and a portable terminal are reduced as much as possible during the game, whereby communication errors and interruption of the game are avoided.For example, a program executed by a controller executes the following control: in response to a request from the first
registered user for the generation of the group, the generated group is associated with at least one of the special items and stored in the
database, and in response to a request from the second
registered user to participate in the group, the second
registered user is associated with the group and stored in the
database, and the authority to possess at least one item from the special items associated with the group is given to the second registered user. In a method executed by another program, the communication between the
server and portable terminal is executed at the timing when the opponent character falls to the lowermost point and the unit game ends.