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