Method for controlling server device, server device, computer-readable recording medium and game system

A server device that provides a game, in which a plurality of players can participate, and that is connected to terminal devices operated by the players via a communication line, the server device being operative:

• to enable a first terminal device to send invitation information to a second terminal device, wherein the invitation information includes specific information to at least specify a landing screen associated with the game;
• to detect when the second terminal device is operated to access the landing screen on a basis of the specific information;
• responsive to said detecting, to give a first incentive to a first player who operates the first terminal device;
• and
• to give a second incentive to the first player when a second player who operates the second terminal device participates in the game and achieves a specific matter that is predetermined in the game.

A non-transitory computer-readable recording medium having a program that can be readable by a computer that provides a game, in which a plurality of players can participate, and that is connected to terminal devices operated by the players via a communication line and which program, when executed by said computer, provides an incentive giving function that:

• enables a first terminal device to send invitation information to a second terminal device, wherein the invitation information includes specific information to at least specify a landing screen associated with the game;
• detects when the second terminal device is operated to access the landing screen on a basis of the specific information;
• and
• responsive to said detecting, gives a first incentive to a first player who operates the first terminal device;
• and
• gives a second incentive to the first player when a second player who operates the second terminal device participates in the game and achieves a specific matter that is predetermined in the game.