From the Box:
Only YOU can solve the mystery of Gravity Falls, exclusively on Nintendo 3DS! A crisis has engulfed the Gnome kingdom! Playing as Mabel and Dipper, you must help Jeff the gnome retrieve the ancient Gnome Gemulets to restore the forest's magic! Equipped with enchanted gnome weapons, fight off strange new creatures, defeat monstrous bosses, and solve puzzles in new and mysterious areas of Gravity Falls. Meet characters like Soos, Grunkle Stan, Old Man McGucket, and others along the way in this fun action-packed game for all ages.