Methods and apparatus provide for: executing a game program in response to each of a plurality of operation signals that input to each of the plurality of ports of a controller port from a plurality of operation devices, wherein the controller port comprises the plurality of ports to which the plurality of operation signals are input from the plurality of operation devices via a network; assigning the plurality of the operation devices to the plurality of ports; obtaining connection information indicating a connection status between the plurality of ports and the plurality of operation devices; and changing the assignment of the plurality of operation devices to the plurality of ports depending on the obtained connection status.