A game apparatus for selectively providing motivation to specific users to continue playing a game, which may include a log information retrieval unit that retrieves log information associated with user identification information related to a plurality of registered users, a game processing unit that starts playing a game and progresses the game based on operation information by the registered users, an index value calculation unit that calculates, for each of the registered users, an index value indicating a possibility that the registered users will not perform a predetermined action within a predetermined period based on the log information retrieved by the log information retrieval unit, and a privilege granting unit that grants a predetermined privilege providing an advantage in the game to a specific user of the plurality of registered users based on the index value calculated by the index value calculation unit for each of the registered users.