Charge Ram attack...
	Cheats...
	Costumes...
	Easy boarding...
	Easy money...
	Elite ship upgrade locations...
	Giant squid attack...
	Infinite money...
	Mayan puzzle locations...
	Revealing all collectible loca...
	Shipwreck locations...
	The IT Crowd reference...
	Uplay rewards...

Defeat all four legendary ships.

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 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

Costume	How to unlock
Cat Outfit	Simply buy the animal pelts to any general store, then craft it.
Hunter Outfit	Buy a red howler monkey skin (5,000R) and white jaguar pelt (6,000R) at any general store, then craft it.
Mayan Outfit	Collect all 16 Mayan Stones from the Mayan Stelae missions, then open the secret door in Tulum.
Stealth Outfit	Complete at least half of the Assassin Contracts.
Templar Outfit	Collect all 5 keys by completing each of the 16 Templar Hunt missions, then unlock the gate to the home in great iguana cove.

When facing large ships (for example, frigates), position your ship near your target, then swim to the ship and eliminate the crew through close quarters. Afterwards, swim back to the Jackdaw then hit each ship with a single broadside. You will immediately win the boarding sequence that follows.

This trick requires a decent amount of hull armor and 10 or more mortar rounds for the Jackdaw ship. Travel to the legendary ship battle in the northeast corner of the map, with the two legendary ships that attack you. You will not be able to defeat both ships without your ship fully upgraded, but you will be able to defeat one if you complete the following steps. When the battle starts, shoot two mortar rounds at the ship you are focusing on while turning around, then release your fire barrels. When they get close, use your heavy shot. Do not get between the two opposing ships or you will quickly be defeated. Once they pass, keep shooting mortars at the ship you are trying to defeat while they are turning around. Repeat the previous steps until you destroy the ship you are focused on. Quickly pick up the loot from the destroyed legendary ship, or else the other ship will ram and sink you quickly. You will get 10,000 Reales and be able to keep it after you die. Repeat this process as many times as desired.

Note: This trick requires the cannon and/or shot upgrades; or upgrades to your chain shot and ram abilities. Also, the Brothers-In-Arms must not have been sunk yet. Start a battle with a group of ships, then sink one of them and ignore the other ships. Collect your loot, then intentionally fail. After respawning, the ship you sunk will also be back with its loot, and you will still have your previously collected loot. Repeat this process as many times as desired to earn 10,000 Reales each time.

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

Elite ship	Location
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)

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.

Proceed through the main missions until you have access to Sequence 2: Memory 3. Proceed through Sequence 2: Memory 3 until you reach the area where the three templars are standing around a table. The "Pickpocket All Templars" optional objective will appear while standing next to them. Pickpocket all three templars, then pause the game and select the "Reload Last Checkpoint" option. The money you pickpocket from the templars will be saved, and you can pickpocket them again. Repeat this process as many times as desired to get an unlimited amount of money. You can get approximately 35,000 R every seven minutes using this glitch. You can use the money earned from this glitch to easily buy all weapons and gear in the game. Note: You can load any sequence and memory you have completed throughout the game, allowing you to use this trick at any point once you have access to the specified sequence and memory. Additionally, this glitch was done on an unpatched version of the game. After the patch has been applied, the glitch can still be used if done once you reach Sequence 2: Memory 3, but it cannot be done after completing the memory.

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

Symbol	Location
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)

To reveal the location of all collectibles (Animus Fragments, Chests, Secrets, and Song Sheets) in the game, synchronize all the viewpoints. Note: To get the West Indies Sea collectibles, you must conquer all Naval Forts.

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

Shipwreck	Location
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)

Go to the map near the entrance to the modern-day Abstergo offices. Two co-workers will begin talking about Chicago. Continue listening and they will talk about John from IT. The male co-worker comments that whenever he requests help, John replies with "Have you tried turning it off and on again?", which is a reference to the British comedy The IT Crowd.

These rewards can only be unlocked after being redeemed in Uplay.

Reward	How to unlock
500 Reales	Redeem For 10 Points.
Edward the Legend Outfit	Redeem For 20 Points.
The Blades of Toledo & exclusive Multiplayer items	Redeem For 30 Points.
The Vengeful Daughter Outfit for multiplayer, customise the Jackdaw with epic items	Redeem For 40 Points.