Multiplayer Achievements:
The Assassin’s Creed III multiplayer achievements are not included and will be removed from the list as they are inaccessible for players. This will ensure players who wish to achieve 100% progression still have the ability to do so. Detailed information and a full list of affected services can be found on Ubisoft Support.

Do Achievements Sync Automatically?
Achievements will be retroactively earned for those accomplishments already completed in your journey, simply launch the game once on Steam, and your progress will sync automatically.

What About Assassin's Creed III Remastered?
Achievements for Assassin's Creed III Remastered are coming soon!

What about Assassin's Creed Liberation?
Achievements for Assassin's Creed Liberation have also been released.