| CPC A63F 13/46 (2014.09) [A63F 13/847 (2014.09); A63F 2300/61 (2013.01)] | 15 Claims |

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1. A game system which executes a game in which a group of two or more players strives to achieve a shared mission, the game system comprising at least one processor configured to function as:
a group organizing unit which associates the two or more players in the group with each other;
a game option setting unit which sets, for each of the two or more players, a game option related to the shared mission;
a game control unit which advances the game for each of the two or more players based on the set game option;
a mission achievement determining unit which determines, based on gameplay data of the two or more players in the group, whether or not the shared mission has been achieved; and
a reward determining unit which determines, based on an achievement status of the shared mission and a setting status of the game option, a reward to be associated with the two or more players,
wherein the group organizing unit allows players who have made different selections for the set game option to be associated with each other in the group, and the game control unit modifies the game for each of the two or more players based on the different selections corresponding to each player.
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