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