Patent attributes
In an online game server, an updater updates at least one of a game program and game data for server stored in a storage section in accordance with an update operation for data to be utilized when to execute a sub game other than a main game in an online game. Updated portion data are a shared library format that can be utilized in the client terminal. A transmitter transmits updated data including at least the updated portion data to the client terminal. In a client terminal, a rewriter rewrites at least one of a game program and game data for client stored in a memory. In the case where there is a specification operational input by a player, a controller controls progress of the online game using the game program or the game data for client without carrying out communication with the online game server.
