Achilles' Original Outfit - Complete all Achilles' Homestead Missions and Interactive Conversations
Altair's Robes - 100% Sync on all story based missions
Assassin's Robes - Unlocked through story progression, Session 5. Different colors can be purchased from general stores.
Captain Kidd's Outfit - Collect all 24 Peg Leg Trinkets, 4 Map Shards and solve the riddle on Oak Island.
Ezio's Robes - Purchase in U-Play store with 30 points earned from in-game events.
Native American Outfit (Connor's pre-robe outfit.) - Collect all Feathers.
Prisoners Outfit - Story progression, Session 8.
At any point beyond Sequence 6, return to the Davenport Homestead and, from the front door, walk around the right side of the manor and hide around the corner at the back. Whistle, and a turkey will appear nearby. Approach it and press up, up, down, down, left, right, left, right, B, A to feed it. This will result in the turkey donning an Assassin's hood and following Connor around.
Shoving Lady in the Green Dragon
Just when you start the second chapter when you arrive in Boston, you will meet a couple who most likely own the Green Dragon. If you go upstairs, you will see the wife of the man who owns the Green Dragon sweeping the floor. If you walk up to her and stand next to her for a few seconds, she will drop the broom and will shove you out of the way. In another couple seconds, she will magically spawn another broom into her hands and continue sweeping the floor. You can do this as many times as you like, and it will continue to happen.
Tyranny of King Washington DLC:
Uniquely Familiar 15 Receive an unexpected gift.
A Wolf in Sheep's Clothing 15 Kill 25 enemies while staying cloaked.
Frontiersman 40 Reach 100% synchronization in the Frontier.
Battle Hardened DLC:
One for All 25 With any of the additional characters, perform 20 ‘Revive’ actions.
A New Challenger Appears 25 Finish a multiplayer game session with each of the additional characters.
Stubborn Stunner 25 Stun 3 pursuers without dying, playing with any of the additional characters.
Wolves for Lambs 25 Complete a Wolfpack multiplayer session on any of the additional maps
Rude Awakening 10 Re-Enter the Animus.
No Good Deed Goes Unpunished 20 Open the Temple Door and learn Desmond's fate.
Mystery Guest 20 Complete Sequence 1 & 2.
How D'ya Like Them Apples 20 Complete Sequence 3.
Heroes are Born 20 Complete Sequence 4.
The Day the Templars Cried 20 Complete Sequence 5.
Tea is for Englishmen 20 Complete Sequence 6.
The Whites of Their Eyes 20 Complete Sequence 7.
Caged Wolf 20 Complete Sequence 8.
Two if by Sea 20 Complete Sequence 9.
Grim Expectations 20 Complete Sequence 10.
Difficult End 20 Complete Sequence 11.
The Sum of Truth 50 Complete Sequence 12.
Perfectionist 50 Complete 100% of all main mission constraints.
An Extraordinary Man 10 Complete the Encyclopedia of the Common Man.
Patent Not Pending 10 Craft one of Franklin's inventions to decorate your Manor.
House Party 10 Recruit any of the Artisans and see them settled on the Homestead.
A Complete Set 20 See all the optional characters settled at the Homestead.
Original Gamer 20 Win a game of Fanorona, Morris and Bowls on the Homestead.
Bring Down the House 20 Explore Fort Wolcott.
Kidd Gloves 30 Uncover the mystery of Oak Island.
All Washed Up 40 Complete all Naval Missions aboard the Aquila.
Entrepreneur, not Pirate! 20 Complete all 12 Privateer Contracts.
Tumblehome 10 Upgrade the Aquila.
By Invitation Only 20 Be invited to join a Club.
In Good Standing 30 Complete all challenges for any of the Clubs.
Man of the People 20 Liberate all districts in Boston OR New York.
Monopoly Man 10 Send a convoy to Boston, New York and the Frontier.
Blowing in the Wind 20 Retrieve every page for one of Ben Franklin's Almanacs.
Completionist 50 Complete ALL progress tracker grid entries.
Multitasking 20 Complete 50% of the Progress Tracker entries.
Spit Roast 20 Perform a double assassination using a musket.
Circus Act 10 Kill 15 guards with a single cannon shot.
Predator 10 Hang 5 enemies by using rope darts.
Prince of Thieves 10 Loot a convoy without killing any of its guards.
Whit's fur ye'll no go by ye! 10 Block a firing line 5 times by using a human shield.
Jager Bomb 20 After becoming fully Notorious, kill 10 Jagers before losing your notoriety.
Magna cum Laude 20 Have a Trainee reach the Assassin Rank.
Coureur des Bois 10 Exchange undamaged pelts at all different general stores.
Eye Witness 10 Witness a predator killing an enemy.
Fin 30 Complete each of the epilogue missions unlocked after the credits roll.
Abstergo Entertainment 10 Reach level 20 in the multiplayer mode.
Hunter/Killer 20 Reach sequence 10 in a map on Wolfpack multiplayer mode.
Winning Team 20 Be on the winning team at the end of a multiplayer game session.
Personalized 10 Customize your multiplayer Profile and Character.
The Truth Will Out 20 Unlock a hacked version of one of the Abstergo videos in the story quest.