This is what I got from the DLC codes most of it can be found in the captains cabin on the ship
The Pirate's Trophy (Game Pack)
UBISOFT ENTERTAINMENT SA
This pack contains The Matched Golden Swords and Treasure Hunter Costume, Picture and Title. The Ivory Wheel, and 3 exclusive pictures, relics, titles.
1 player
Network Players 2-8
HD Video Output 720p,1080i,1080p
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? 2013 Ubisoft Entertainment. All Rights Reserved. Assassin?s Creed, Black Flag and Ubisoft, and the Ubisoft logo are trademarks of Ubisoft Entertainment in the US and/or other countries.
You get this and other dlc for playing and completing other AC games all suits of past AC from be a member of
https://acinitiates.com
ASSASSIN'S CREED IV BLACK FLAG
AC 4 Black Flag - Connor Costume
UBISOFT ENTERTAINMENT SA
This pack contains:
Spiltblood Sail
Black Skull Sail
Pirate Song
Connor custume
? The Initiate ? title
Not found the sails yet and no idea what the song is.
ASSASSINS CREED IV BLACK FLAG BLACK CHEST
UBISOFT ENTERTAINMENT SA
?Assassin?s Creed? IV Black Flag Aveline?s Mission
?Assassin?s Creed? IV Black Flag Black Island Pack
?Assassin?s Creed? IV Black Flag Hidden Mystery Pack
?Assassin?s Creed? IV Black Flag Sacrificed Secrets Pack
?Assassin?s Creed? IV Black Flag The Lost Treasures Pack
?Assassin?s Creed? IV Black Flag The Trove of Mystery Pack
?Assassin?s Creed? IV Black Flag Pirate's Bounty Pack
?Assassin?s Creed? IV Black Flag Captain Kenway's Legacy Pack
?Assassin?s Creed?IV Black Flag Uplay Passport
The mission and the passport are the only things I have found not sure what content is for MP