SERVER DEVICE, CONTROL METHOD FOR SERVER DEVICE, GAME SYSTEM, AND COMPUTER-READABLE RECORDING MEDIUM

A server device and the like that can make a whole game and SNS more active by promoting the movement of players between groups to enhance the mobility of game participants. A server device comprises: an information storage unit for storing information of a game in which a plurality of players are able to participate and which includes a battle event; and a control unit for accessing the information and executing an operation related to the game. The server device executes a predetermined step that includes performing, when a first player transfers from a first group to a second group, payment and receipt of transfer points as compensation for the transfer between at least two out of the first player, the first group, and the second group.