Download and play against a Ghost from a Leaderboard entry.
Complete an event.
Completely finish the chicken coop for Travis.
Perform the Hoedown Throwdown at Meadow Hall.
Joined the 3rd Street Saints.
Completed the 2nd mission on Normal or harder.
Used a Health Pack to replenish life after taking body damage.
Purchased an item from the Armory.
Perform a chip trick at the table or while a menu screen is displayed
Continue playing to unlock this secret achievement.
Purchase all the Free Blades from Hundert Tonne
Engage Witch Time successfully 10 times.
Complete the Vestibule.
Execute a Torture Attack.
Unlock all 20 pieces of Subject 16's video.
Wear the Auditore cape in each city.
Collect all the Feathers.
Make sure Dr. Meadows can take another look at the skies.
Rewrite reality for the first time.
Destroy stockpiled Stark weapons in the Escape mission
Completed 1 chapter in Co-op on any difficulty
Defeated the Lambent Brumak
Completed all campaign acts on Casual Difficulty
Captured a Brumak
Create and name a custom build character.
Unlock secret area in the museum.
Complete the "Opening the Ark" level in Story Mode.
Kill 100 aliens
Take steroids in SP
Sweep 5 guards at once by using a Long Weapon.
Place a cube on a button without touching the cube
Complete Story Mission 2.
Complete Story Mission 1.
Destroy 30 objects in 60 seconds.
Cause chaos for the first time.
Escape the Taken to the motel.
Defeat Matthew Patel without losing a life.
Stun 4 guards at once by throwing sand in their face.
Complete DNA Sequence 11.
Complete DNA Sequence 10.
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 9.
Kill 10 enemies while remaining in conflict without being hit.
Discover the Assassin's Tomb inside Santa Maria della Visitazione.
Finish Chapter 01.
Finish Chapter 00.
Conquer Stage 1.