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