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.
Reach 80% of your stronghold's total value.
Escape the hideout.
Complete DNA Sequence 14.
Unlock all 20 pieces of Subject 16's video.
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 11.
Complete DNA Sequence 10.
Complete DNA Sequence 9.
Sweep 5 guards at once by using a Long Weapon.
Discover the Assassin's Tomb inside the Basilica di San Marco.
Stun 4 guards at once by throwing sand in their face.
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.
Complete DNA Sequence 7.
Buy a Painting from Florence and Venice.
Complete training and reenter the Animus.
Complete DNA Sequence 6.
Tint your clothes with those colors: Wetland Ebony and Wetland Ivory.
Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Complete DNA Sequence 5.
Discover the Assassin's Tomb inside the Torre Grossa.
Kill 10 enemies while remaining in conflict without being hit.
Complete your first assassination mission for Lorenzo Il Magnifico.
Perform an Air Assassination on a Poisoned NPC.
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.
Win a race against thieves!
Pickpocket 1000 Florins.
Synchronize 10 View Points.
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.
Hide 5 dead bodies in a Bale of Hay.
Defend a woman's honor.
Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.
Sprint for 100 meters.
Enter the Animus 2.0.
Break out of Abstergo.
Be reborn as Ezio Auditore Da Firenze.