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