Provided are a game system, a game method, a game program, and a game server which enable, in a game in which multiple players can participate, contribution to a team through an action other than an interpersonal battle within the game and enable, in association with said action, improvement in proficiency in operations required for interpersonal battles. This game system 1 comprises: a character action control unit 30 which controls the action of a player character; a character state determination unit 50 which, when a battle between a neutral character and the player character takes place and the result of the battle between the neutral character and the player character indicates a victory for the player character, associates the neutral character with the player; and an ally character control unit 55 which, after having stored a neutral character in a virtual character storage region 320 as an ally character, performs control so as to repeatably cause the ally character to emerge into a play field 300 from the character storage region 320 and store the ally character back into the character storage region 320.
GAME SYSTEM, GAME METHOD, GAME PROGRAM, AND GAME SERVER