Game system and computer program

The invention relates to a game system and a computer program. Provided is a game system with which the time required for the exchange or sharing of opinions between users in a game can be suppressed. The game system (1) provides a quiz game that is played by eight users simultaneously. Furthermore, in a quiz game information sharing phase, the game system (1) provides, via a game screen (G1) for part selection, a selection opportunity that is shared by the eight users such that eight selected parts corresponding to the eight users are selected individually by the eight users from three part images (MG1-MG3) of an enemy character image (MG), and provides, in the selection opportunity, selection status information relating to the eight selected parts. Then, in a battle phase which follows the information sharing phase, the game system (1) imparts, on the basis of the selection result in the information sharing phase, the quiz game with changes corresponding to the eight selected parts such that user characters