Full list of all 64 Assassin's Creed III achievements worth 1,350 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 14 achievements worth 350 Gamerscore.
Complete Sequence 3.
Complete Sequence 4.
Complete Sequence 7.
Complete Sequence 9.
Explore Fort Wolcott.
Be invited to join a Club.
Complete 50% of the Progress Tracker entries.
Hang 5 enemies by using rope darts.
Have a Trainee reach the Assassin Rank.
Find all pivots and sync the Animus to the Cloud.
Complete ALL progress tracker grid entries.
Complete each of the epilogue missions unlocked after the credits roll.
Open the Temple Door and learn Desmond's fate.
Complete Sequence 12.
Complete 100% of all main mission constraints.
Complete the Encyclopedia of the Common Man.
Complete Sequence 11.
Win a game of Fanorona, Morris and Bowls on the Homestead.
Loot a convoy without killing any of its guards.
Complete all challenges for any of the Clubs.
Complete Present - Abstergo.
Complete Sequence 10.
Kill 15 guards with a single cannon shot.
Reach level 20 in the multiplayer mode.
Complete all Naval Missions aboard the Aquila.
Complete all 12 Privateer Contracts.
Uncover the mystery of Oak Island.
Exchange undamaged pelts at all different general stores.
Send a convoy to Boston, New York and the Frontier.
Craft one of Franklin's inventions to decorate your Manor.
See all the optional characters settled at the Homestead.
After becoming fully Notorious, kill 10 Jagers before losing your notoriety.
Witness a predator killing an enemy.
Complete Present - Stadium.
Complete Sequence 8.
Upgrade the Aquila.
Complete Sequence 6.
Unlock a hacked version of one of the Abstergo videos in the story quest.
Customize your multiplayer Profile and Character.
Be on the winning team at the end of a multiplayer game session.
Reach sequence 10 in a map on Wolfpack multiplayer mode.
Liberate all districts in Boston OR New York.
Perform a double assassination using a musket.
Retrieve every page for one of Ben Franklin's Almanacs.
Complete Present - Skyscraper.
Complete Sequence 5.
Recruit any of the Artisans and see them settled on the Homestead.
Complete Sequence 1 & 2.
Block a firing line 5 times by using a human shield.
Re-Enter the Animus.
With any of the additional characters, perform 20 ‘Revive’ actions.
Complete a Wolfpack multiplayer session on any of the additional maps.
Finish a multiplayer game session with each of the additional characters.
Stun 3 pursuers without dying, playing with any of the additional characters.
Reach 100% synchronization in the Frontier.
Defeat Benedict Arnold.
Kill 25 enemies while staying cloaked.
Receive an unexpected gift.
Reach 100% synchronization in Boston.
Defeat Putnam.
Use Eagle Flight to travel 1 km.
Reach 100% synchronization in New York.
Defeat George Washington.
Kill 125 enemies using Bear Might.