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.
Escape the hideout.
Complete DNA Sequence 14.
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.
Sweep 5 guards at once by using a Long Weapon.
Collect all the Feathers.
Complete DNA Sequence 11.
Spend 5000 florins on Courtesans.
Complete DNA Sequence 10.
Unlock all 20 pieces of Subject 16's video.
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 9.
Tint your clothes with those colors: Wetland Ebony and Wetland Ivory.
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.
Reach 80% of your stronghold's total value.
Buy a Painting from Florence and Venice.
Complete training and reenter the Animus.
Complete DNA Sequence 6.
Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Complete DNA Sequence 5.
Discover the Assassin's Tomb inside the Torre Grossa.
Perform an Air Assassination on a Poisoned NPC.
Complete your first assassination mission for Lorenzo Il Magnifico.
Complete DNA Sequence 4.
Discover the Assassin's Tomb inside Santa Maria del Fiore (The Duomo).
Discover the Assassin's Tomb inside the catacombs under Santa Maria Novella.
Intercept a Borgia Courrier.
Upgrade a building in the Stronghold.
Complete DNA Sequence 3.
Find the 8 statuettes in Monteriggioni.
Complete DNA Sequence 2.
Synchronize 10 View Points.
Pickpocket 1000 Florins.
Hide 5 dead bodies in a Bale of Hay.
Toss more than 300 florins on the ground.
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.
Defend a woman's honor.
Win a race against thieves.
Sprint for 100 meters.
Enter the Animus 2.0.
Break out of Abstergo.
Be reborn as Ezio Auditore Da Firenze.