Here is the full list of all 51 Assassin's Creed II trophies - there are 34 bronze, 15 silver, 1 gold and 1 platinum.
Unlock all trophies.
Wear the Auditore cape in each city.
Unlock all 20 pieces of Subject 16's video.
Collect all the Feathers.
Escape the hideout.
Complete DNA Sequence 14.
Perform an Air Assassination on a Poisoned NPC.
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 11.
Complete DNA Sequence 10.
Complete DNA Sequence 9.
Discover the Assassin's Tomb inside Santa Maria della Visitazione.
Complete DNA Sequence 8.
Kick a Guard while using the Flying Machine.
Spend 5000 florins on Courtesans.
Stun 4 guards at once by throwing sand in their face.
Sweep 5 guards at once by using a Long Weapon.
Find the 8 statuettes in Monteriggioni.
Reach 80% of your stronghold's total value.
Complete your first assassination mission for Lorenzo Il Magnifico.
Win a race against thieves.
Defend a woman's honor.
Toss more than 300 florins on the ground.
Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Discover the Assassin's Tomb inside the Basilica di San Marco.
Complete DNA Sequence 7.
Buy a Painting from Florence and Venice.
Complete training and reenter the Animus.
Complete DNA Sequence 6.
Tint your clothes with those colors: Wetland Ebony and Wetland Ivory.
Discover the Assassin's Tomb inside Santa Maria del Fiore (The Duomo).
Complete DNA Sequence 5.
Discover the Assassin's Tomb inside the Torre Grossa.
Kill 10 enemies while remaining in conflict without being hit.
Pickpocket 1000 Florins.
Complete DNA Sequence 4.
Unlock a piece of Subject 16's video.
Use your Eagle Vision to scan a Glyph in the environment.
Intercept a Borgia Courrier.
Hide 5 dead bodies in a Bale of Hay.
Discover the Assassin's Tomb inside the catacombs under Santa Maria Novella.
Upgrade a building in the Stronghold.
Complete DNA Sequence 3.
Complete DNA Sequence 2.
Synchronize 10 View Points.
Complete DNA Sequence 1.
Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.
Sprint for 100 meters.
Enter the Animus 2.0.
Break out of Abstergo.
Be reborn as Ezio Auditore Da Firenze.