While the main questline and many side quests of Fallout 4 will keep any Sole Survivor busy, even more are added by the DLC Far Harbor. This complex and morally challenging DLC all takes place on a mysterious fog-covered island off the coast of Maine that has three factions vying for control. What starts out as a simple missing persons case in the Commonwealth soon becomes far more tricky, with ultimately the fate of everyone on the island in the Sole Survivors hands.