Etrian Odyssey 3: The Drowned City (Nintendo DS)

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BGM Option

To unlock the BGM option you have beat the game.

Various Guild Card Emblems

For reaching certain milestones throughout the game, you will get certain emblems appended to your Guild Card.

EmblemHow to unlock
Abyssal DesireGet the Deep City Ending.
Armoroad's FinestComplete the Barter Log, Cargo Manifest and Epic Glossary lists.
Eldest PathGet the True Ending.
Guild DebutComplete the first Mission.
Limit MasterLearn every Limit Skill.
Master of the SeaDefeat all Sea Bosses.
Porcelain WishGet the Armoroad Ending.
Quests CompleteComplete all Bistro Quests.
Sea MediatorFinish the 2nd Stratum.
Starry VisitorsDefeat the 6th Stratum Boss.
Treasure HunterOpen every Treasure Chest.
Yggdrasil CuratorComplete the Item Compendium list.
Yggdrasil HunterComplete the Monstrous Codex list.