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