. "In the Golden Sun series, there are various dungeon-style locations that are not mandatory to complete for the sake of reaching each game's ending. This includes one main one in the original, and four main ones in the Lost Age."@en . "Optional Dungeons"@en . "In the Golden Sun series, there are various dungeon-style locations that are not mandatory to complete for the sake of reaching each game's ending. This includes one main one in the original, and four main ones in the Lost Age."@en .