A game apparatus includes: a plurality of operation controllers to be operated by separate players; obtained partial area storage locations for storing a partial area obtained by each player as an obtained partial area; a partial area choice mechanism for allowing each player to choose a partial area in turns; a single-player-mode game execution mechanism for, when a partial area is chosen, executing a single-player-mode game for a player who has chosen the partial area; and an obtained partial area adding mechanism for, depending on a result of the single-player-mode game, storing the partial area chosen by the player who has played the single-player-mode game as an obtained partial area of the players in the obtained partial area storage locations.