A server device is configured to display a game screen on a user terminal used by a user. The server device includes an item manager configured to manage points of an item obtained by the user for use in the game, and a game processor configured to calculate a first total value of points of an item selected by the user via the user terminal, to calculate a second total value of points of an item for increasing the first total value, and to increase the first total value according to the second total value.