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