Dragon Quest V: Hand of the Heavenly Bride

Dragon Quest V takes place over roughly thirty years of the main character's life, from when he is born through to when he gets married and has a family. The title introduced a gameplay dynamic in which monsters from random encounters may offer to join the player's party. This concept was used in later Dragon Quest games, and in the Dragon Quest Monsters series constituted the primary way to form a party. (wikipedia.org)