Charge Ram attack...
	Costumes...
	Easy "Killer Killer" achieveme...
	Easy "Redingote Up!" achieveme...
	Easy money...
	Elite ship upgrade locations...
	Freedom Cry: Achievements...
	Giant squid attack...
	Mayan puzzle locations...
	Secret Achievements...
	Shipwreck locations...
	Various Achievements...
	Various Cheats...

Defeat all four legendary ships.

Complete the indicated task to unlock the corresponding costume.

Costume	How to unlock
Altair's Robes	Previously play any Assassin's Creed series game on your Uplay profile.
Brown Cloak	Available for purchase at a General Store for 1,500 R.
Connor Kenway's Outfit	Previously play three Assassin's Creed series games on your Uplay profile.
Crimson Cloak Outfit	Available for purchase at a General Store for 3,000 R.
Edward the Legend Outfit	Unlocked in Uplay for 20 points.
Explorer Outfit	Complete Community Challenge #6 (done online).
Ezio Auditore's Robes	Previously play two Assassin's Creed series games on your Uplay profile.
Feline Pelt Outfit	Craft one jaguar pelt and one ocelot pelt.
Governor's Outfit	Find and share a social chest (done online)
Hunter Outfit	Craft one red howler monkey skin and one white jaguar pelt (reduces animal aggression).
Mayan Outfit	Complete all Mayan Stone side-quests (deflects bullets).
Merchant Outfit	Available for purchase at a General Store for 10,000 R.
Officer's Outfit	Complete the "Great Reputation 1" trading mission to Gibraltar with Kenway's Fleet (a Mediterranean Sea mission).
Pirate Captain Outfit	Available for purchase at a General Store for 8,000 R.
Pirate Cloak	Available for purchase at a General Store for 6,000 R.
Politician's Outfit	Available for purchase at a General Store for 12,000 R.
Privateer Outfit	Available for purchase at a General Store for 5,000 R.
Shark Hunter Outfit	Craft one bull shark skin and one hammerhead shark bone.
Stealth Outfit	Complete 50% of Assassin Contract side-quests (decreases visibility and improves stealth).
Templar Armor	Complete all Templar Hunt side-quests (gives 25% damage reduction).
Whaler Outfit	Craft with three white whale skins.

If desired, get harpoon upgrades, harpoon storage, strength, and extra armor to make this process easier. Sail to a Killer Whale hunting location (for example, coordinates 537, 340 on the world map). After a deck hand announces the presence of a whale, Kenway will be sent with a harpoon to hunt it. Harpoon the whale and follow it, being careful when it dives. It will eventually surface again on the horizon and run at your boat. Harpoon it again to avoid taking damage. Repeat the process until the whale's health is taken down to unlock the achievement.

Go to a General Store, then select the "Hunting Goods" tab. Purchase the Red Howler Monkey Skin for 5,000 R and White Jaguar Pelt for 6,000 R. Select the "Crafting" tab at the main menu, then choose the "Hunting Outfit" option.

Complete the "Mister Walpole, I presume?" mission during Sequence 2 Memory 3. Pause game play while not in a mission, select "Progress Tracker", and choose "Sequence 2, Memory 3". Replay the mission and continue until you are given the optional objective to pickpocket three Templars. Pickpocket them to get at least 750 Reales. Immediately pause game play, select "Reload", and reload the game from the last checkpoint. You can now pickpocket the Templars again. Repeat the process until you collect at least 100,000 Reales.

Search the following locations to find the plans for the corresponding ship upgrade.

Location	How to unlock
Elite Broadside Cannons	The Blue Hole (coordinates 471, 170)
Elite Fire Barrel Storage	Isla Providencia (coordinates 502, 44)
Elite Fire Barrels	San Juan (coordinates 479, 487)
Elite Harpoon	Andreas Island (coordinates 579, 720)
Elite Heavy Shot	Petite Cavern (coordinates 901, 263)
Elite Hull	San Ignacio (coordinates 379, 770)
Elite Ram	La Concepcion Shipwreck (coordinates 181, 296)
Elite Round Shot	Kabah Ruins (coordinates 769, 145)
Elite Swivel Guns	Devil's Eye Cave (coordinates 488, 353)

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Elevator to the Gallows (20 points)	Kill a player using a lift that has been trapped with Booby Trap.
Firepower (15 points)	Kill 5 guards at once with a blunderbuss.
His Full Attention (50 points)	Freedom Cry - Achieve 100% synchronization
His Own Medicine (20 points)	Gave the Gouverneur a taste of his own medicine.
His Word Was "Perhaps" (30 points)	Freedom Cry - Completed all missions.
Liberation Day (15 points)	Free your first slave.
Preemptive Strike (20 points)	Playing as The Orchid, block 10 abilities from opponents with Sabotage.
Queen Anne's Revenge (20 points)	Playing as Blackbeard, perform an acrobatic kill and a gun kill in less than 10 seconds.
Sacred Land (20 points)	Playing as The Jaguar, be the highest scoring player of a Domination game session.
Seeds of independence (40 points)	Liberate 500 slaves.

Swim inside the Antocha shipwreck at coordinates 630,660. While looking out one of the windows you will be able to see a giant squid take down a whale.

Complete all Mayan puzzles at the indicated location to unlock the Mayan Outfit at Tulum (coordinates 72, 404).

Location	How to unlock
Symbol #1	Great Inagua; completed during DNA Sequence 4, Memory 1.
Symbol #2	Cat Island (coordinates 736, 692)
Symbol #2	Mantanzas (coordinates 340, 643)
Symbol #4	Cape Bonavista (coordinates 180, 594)
Symbol #5	Tulum (coordinates 71, 402)
Symbol #6	Pinos Isle (coordinates 337, 475)
Symbol #7	Pinos Isle (coordinates 344, 476)
Symbol #8	Tortuga (coordinates 875, 379)
Symbol #9	Long Bay (coordinates 524, 255)
Symbol #10	Isla Providencia (coordinates 503, 45)
Symbol #11	Isla Providencia (coordinates 505, 43)
Symbol #12	New Bone (coordinates 434, 113)
Symbol #13	Misteriosa (coordinates 302, 120)
Symbol #14	Misteriosa (coordinates 295, 197)
Symbol #15	Santanillas (coordinates 214, 244)
Symbol #16	Santanillas (coordinates 224, 243)

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Bunker Buddies (20 points)	Complete present day mission 4.
Getting Weird Around Here (20 points)	Complete present day mission 3.
Hungover (10 points)	Wake up in a haystack.
It's All Good (20 points)	Complete present day mission 5.
Routine Hacking (20 points)	Complete present day mission 2.

The following underwater shipwrecks can be found at the indicated location after Sequence 6-1 is completed.

Location	How to unlock
Shipwreck #1	San Ignacio (coordinates 378, 769)
Shipwreck #2	Petite Caverne (coordinates 901, 264)
Shipwreck #3	Jiguey (coordinates 564, 539)
Shipwreck #4	Atocha (coordinates 632, 661)
Shipwreck #5	Black Trench (coordinates 221, 449)
Shipwreck #6	San Juan (coordinates 480, 486)
Shipwreck #7	Devil's Eyes Cave (coordinates 487, 356)
Shipwreck #8	Anotto Bay (coordinates 622, 276)
Shipwreck #9	Ambergris Key (coordinates 55, 177)
Shipwreck #10	The Blue Hole (coordinates 470, 170)
Shipwreck #11	Kabah Ruins (coordinates 768, 144)
Shipwreck #12	La Concepcion Shipwreck (coordinates 180, 296)
Shipwreck #13	Antocha (coordinates 629, 661)

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
A New Hope (20 points)	Complete memory sequence 9.
A Pirate's Life For Me (20 points)	Complete memory sequence 3.
Adrift (20 points)	Complete memory sequence 8.
All Aboard! (30 points)	Board a ship without losing any crew members.
All Rounder (20 points)	Play on every game mode, and use every ability and ranged weapon once in Multiplayer.
Barfly (30 points)	Unlock all taverns.
Been Down So Long... (20 points)	Complete memory sequence 11.
Business And Pleasure (20 points)	Earn 50,000 reales.
By The Book (50 points)	Complete 100% of all main mission constraints.
Cannon Fodder (5 points)	Recruit 500 crew members.
Cartographer (20 points)	Visit every location of the game.
Committed To The Cause (20 points)	Reach level 55 in Multiplayer.
Death Of A Salesman (20 points)	Complete memory sequence 5.
Destroyer (40 points)	Fully upgrade the Jackdaw.
Devil Of The Caribbean (40 points)	Defeat all 4 legendary ships.
Employee Of The Month (30 points)	Complete 25 Abstergo challenges.
Excavator (10 points)	Find a buried treasure.
FTFY (10 points)	Fully upgrade your hideout.
Ghost In The Machine (10 points)	Hack 15 computers in Abstergo Entertainment.
Good While It Lasted (20 points)	Complete memory sequence 2.
Help A Brother Out (20 points)	Complete a Templar Hunt sequence.
Heroes Aren't Born (10 points)	Complete memory sequence 1.
Just Like Starting Over (20 points)	Complete memory sequence 12.
Killer Killer (10 points)	Harpoon a killer whale.
King Of The Castle (30 points)	Capture all forts.
Lab Technician (10 points)	Play and complete a game session of Game Lab in the Multiplayer Public playlist.
Master Of The Caribbean (20 points)	Complete the Discovery Mode of Wolfpack in Multiplayer.
Mer-man (10 points)	Swim a total of 1 nmi.
Mixing Up The Medicines (20 points)	Complete memory sequence 6.
My Elusive Fortune (20 points)	Complete memory sequence 10.
No Apologies (20 points)	Complete memory sequence 4.
Owned (10 points)	Complete every activity in a single location.
Personal Bag Of Tricks (10 points)	Finish a game session with an ability set that you customized in Multiplayer.
Redingote Up! (10 points)	Craft the Hunter outfit.
Roped In (10 points)	Perform 5 air assassinations from a swinging rope.
Saw That One Coming... (50 points)	Complete memory sequence 13.
Sea Legs (30 points)	Complete all naval contracts.
Seven Deadly Seas (10 points)	Explore all underwater shipwrecks.
Sharing Is Caring (10 points)	Share each type of discovery with friends once.
Silence, Fool! (5 points)	Kill a guard ringing a bell.
Siren Song (20 points)	Rescue pirate hostages by distracting enemies with "dancers."
The Hammer Falls (20 points)	Complete memory sequence 7.
Thug Life (30 points)	Plunder 30 ships.
Vault Raider (30 points)	Unlock the secret door in Tulum.
Wild West Indies (20 points)	Kill 4 enemies in a row using multi-pistols.

If you finish enough Abstergo challenges - as below - you will unlock the named cheats. They can be found in the Cheats option in the Abstergo Challenges menu. Note: You cannot earn Achievements or save the game while these are in use.

Unlockable	How to unlock
Armed to the Teeth	Finish 90 Abstergo Challenges.
Arrr Matey!	Finish 20 Abstergo Challenges.
Celestial Navigation	Finish 10 Abstergo Challenges.
Dead Men Tell No Tales	Finish 70 Abstergo Challenges.
Deceased Crew	Finish all 100 Abstergo Challenges.
Loaded to the Gunwhale	Finish 50 Abstergo Challenges.
No Quarter	Finish 30 Abstergo Challenges.
Poseidon's Will	Finish 60 Abstergo Challenges.
Scourge of the Seven Seas	Finish 40 Abstergo Challenges.
Shiver Me Timbers	Finish 80 Abstergo Challenges.