GAME SYSTEM, CONTROL METHOD USED IN THE SAME AND COMPUTER PROGRAM

PROBLEM TO BE SOLVED: To provide a game system capable of generating a sense of solidarity among users of respective user terminals.SOLUTION: A plurality of user terminals 8 are connected to a game system 1 through a local area network 5B. The game system 1 discriminates each user terminal 8 located in the same store 4 on the basis of position information of each user terminal 8, and groups respective user terminals 8 located in the same store 4 as one group so that a mobile game based on a common game field can be provided to each user terminal 8 located in the same store 4 on the basis of the discrimination result.