To provide a server device, which is capable of achieving a team versus game having a higher entertainment, by properly deciding a team strength at the real competition and correcting a player's feeling of unfairness.

The server device includes: a participated character extraction means for extracting a character participating in an actual competition during competition; and a team strength calculation means for calculating the team strength value based on a capability value of the character extracted by the participated character extraction means. The server device also includes: a strength difference calculation means 71 for calculating a difference of the team strength value of each team which are calculated by the team strength calculation means of each terminal device; and a benefit providing means 72 for providing a benefit based on the difference of the team strength value calculated by the strength difference calculation means 71 with respect to the team, when the team whose team strength value is lower than a competitor wins the competition.