Image: Rebel Wolves / Bandai NamcoOfficial screenshot from Rebel Wolves / Bandai Namco.
Together Forever is a hidden achievement for one of the secret early endings, and one of the rarest in the game. It hides inside a specific quest, so follow the steps from a spare save.
Home Sweet HomeThis quest deals with Coen's guilt over his family's past, set inside a looping nightmare. It is hidden and hard, with no vampire form, but it holds the secret Together Forever trophy.
Silts TowerSilts Tower is a scouting tower in The Silts with a roof Coen can stand on. A ritual is under way when you arrive, so decide whether to interrupt it before you climb.Start Home Sweet Home at Silts Tower. Let the dream loop play out four times, and on the fifth cycle choose to stay with your family.
Guides suggest doing this on an easier difficulty from a save made before the quest, ideally after you already have Uphill Battle.
Choose to stay with your family for good.