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.
Reach level 20 in the multiplayer mode.
Unlock a hacked version of one of the Abstergo videos in the story quest.
Reach sequence 10 in a map on Wolfpack multiplayer mode.
Complete ALL progress tracker grid entries.
Win a game of Fanorona, Morris and Bowls on the Homestead.
Complete the Encyclopedia of the Common Man.
Complete all challenges for any of the Clubs.
Loot a convoy without killing any of its guards.
Find all pivots and sync the Animus to the Cloud.
Exchange undamaged pelts at all different general stores.
Hang 5 enemies by using rope darts.
Perform a double assassination using a musket.
Send a convoy to Boston, New York and the Frontier.
Complete all Naval Missions aboard the Aquila.
Complete 100% of all main mission constraints.
Complete all 12 Privateer Contracts.
Complete each of the epilogue missions unlocked after the credits roll.
Open the Temple Door and learn Desmond's fate.
Complete Sequence 12.
Uncover the mystery of Oak Island.
Craft one of Franklin's inventions to decorate your Manor.
See all the optional characters settled at the Homestead.
Complete Sequence 11.
Have a Trainee reach the Assassin Rank.
Liberate all districts in Boston OR New York.
Complete 50% of the Progress Tracker entries.
Retrieve every page for one of Ben Franklin's Almanacs.
Complete Present - Abstergo.
Complete Sequence 10.
Kill 15 guards with a single cannon shot.
Witness a predator killing an enemy.
Explore Fort Wolcott.
Upgrade the Aquila.
Complete Sequence 9.
After becoming fully Notorious, kill 10 Jagers before losing your notoriety.
Complete Present - Stadium.
Complete Sequence 8.
Complete Sequence 7.
Complete Sequence 6.
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.
Customize your multiplayer Profile and Character.
Be on the winning team at the end of a multiplayer game session.
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.
Stun 3 pursuers without dying, playing with any of the additional characters.
Finish a multiplayer game session with each 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.