Abstract: A game service platform server for providing a game service platform includes: a game association module to allow a first user device of a first user to access each of a plurality of games provided by the game service platform server; and a friend management module to: receive a service request from the first user device to access a game, associated with account information of a social network service (SNS) subscribed by the first user; inquire an acquaintance list of the first user to determine whether SNS acquaintances of the first user have joined the game; register, automatically, an SNS acquaintance as a game friend of the first user in response to a determination that the SNS acquaintance has joined the game; and transmit, to the first user device, game group information including results of the determination for each of the SNS acquaintances of the user.

Abstract: A ranking method and system for providing a ranking of a game friend. The method includes registering a game friend who has joined a game service. The method further includes calculating a ranking of the user with respect to a game friend based on a ranking inquiry request received from the user terminal, and providing the user terminal with the calculated ranking of the user. The user terminal drives a game service platform associated with a plurality of games and provides some information needed for automatic friend registration and the ranking inquiry request information through the game service platform.

Abstract: A method executed by a game service platform server for searching game challenge opponents includes receiving a game challenge opponent request generated according to a motion of the first terminal, receiving a first desired distance and a first position of the first terminal, searching for a second terminal within the first desired distance based on a second position received from a second terminal, receiving a second desired distance from the second terminal, determining whether the first terminal is located within the second desired distance based on the first position, and setting the searched second terminal to be a game challenge opponent candidate and providing user information of the searched second terminal to the first terminal when the first terminal is determined as being located within the second desired distance, in which the first and the second terminals execute a game service platform and providing the game challenge opponent candidate.

Abstract: A ranking method and system for providing a ranking of a game friend. The method includes registering a game friend who has joined a game service. The method further includes calculating a ranking of the user with respect to a game friend based on a ranking inquiry request received from the user terminal, and providing the user terminal with the calculated ranking of the user. The user terminal drives a game service platform associated with a plurality of games and provides some information needed for automatic friend registration and the ranking inquiry request information through the game service platform.

Abstract: A method for providing a game through a connection with a challenge opponent, performed by a game service platform server managing a plurality of games, the method including: receiving challenge game selection information and challenge opponent request information of a challenge applicant from a first user terminal; transmitting challenge application information to a second user terminal, which is a terminal of at least one member specified based on the challenge opponent request information; and setting the member accepting a challenge to the challenge opponent based on challenge acceptance information received from the second user terminal. The first user terminal and the second user terminal execute a game service platform managing the plurality of games and provide the challenge opponent request information and the challenge acceptance information through the game service platform, respectively.

Abstract: A ranking method and system for providing a ranking of a game group is disclosed. The method includes creating a game group including a user and at least one member among the user's registered friends who have joined a game service, based on a game group creation request received from a user terminal. The method further comprises calculating a ranking of the user with respect to other members of the created game group based on a ranking inquiry request received from the user terminal, and providing the user terminal with the calculated ranking of the user. The user terminal drives a game service platform associated with a plurality of games and provides the game group creation request information and the ranking inquiry request information through the game service platform.

Abstract: A ranking method and system for providing a ranking of a game friend. The method includes registering a game friend who has joined a game service. The method further includes calculating a ranking of the user with respect to a game friend based on a ranking inquiry request received from the user terminal, and providing the user terminal with the calculated ranking of the user. The user terminal drives a game service platform associated with a plurality of games and provides some information needed for automatic friend registration and the ranking inquiry request information through the game service platform.

Abstract: A ranking method and system for providing a ranking of a game group is disclosed. The method includes creating a game group including a user and at least one member among the user's registered friends who have joined a game service, based on a game group creation request received from a user terminal. The method further comprises calculating a ranking of the user with respect to other members of the created game group based on a ranking inquiry request received from the user terminal, and providing the user terminal with the calculated ranking of the user. The user terminal drives a game service platform associated with a plurality of games and provides the game group creation request information and the ranking inquiry request information through the game service platform.

Abstract: A method and a system are disclosed. The method that is executed by a game service platform server managing a plurality of games for searching game challenge opponents includes: receiving a game challenge opponent request, on the game service platform server, generated according to a motion of a first terminal from the first terminal; receiving a position of the first terminal and a distance from the first terminal; searching for a second terminal based on the position and the distance; and setting the searched second terminal to be a game challenge opponent candidate and providing user information for the searched second terminal to the first terminal, wherein the game service platform server executes a game service platform managing the plurality of games and provides the game challenge opponent candidate request through the game service platform.

Abstract: Provided is a connection management method and system for relaying a client and a backend module of a server on a server side. A connection management method performed by a connection management system may include receiving a request message from a client device, adding an authentication tag and a service tag for a connection to the request message, verifying a right of the authentication tag and a right of the service tag using a uniform resource identifier (URI) of the request message, searching for a service corresponding to the request message using the URI, and transferring the request message to the found service.