A server device connected with a player terminal used by a player when performing a game operation over a network includes: a rental unit; a providing unit; a storage unit configured to store player information in which the rental game content rented from the rental unit is set as game content temporarily possessed by the player, and the game content provided by the providing unit is set as game content possessed by the player; a parameter varying unit; a game content determination unit; a parameter setting unit configured to set a parameter of the game content based on a parameter of the rental game content varied by the parameter varying unit; a condition determination unit configured to determine whether a return condition of the rental game content is satisfied; and an update unit configured to update the player information stored in the storage unit.