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.
Discover the Assassin's Tomb inside Santa Maria della Visitazione.
Discover the Assassin's Tomb inside the Basilica di San Marco.
Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Escape the hideout.
Complete DNA Sequence 14.
Complete DNA Sequence 11.
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 10.
Complete DNA Sequence 9.
Complete DNA Sequence 8.
Kick a Guard while using the Flying Machine.
Complete DNA Sequence 7.
Reach 80% of your stronghold's total value.
Spend 5000 florins on Courtesans.
Sweep 5 guards at once by using a Long Weapon.
Buy a Painting from Florence and Venice.
Tint your clothes with those colors: Wetland Ebony and Wetland Ivory.
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.
Kill 10 enemies while remaining in conflict without being hit.
Stun 4 guards at once by throwing sand in their face.
Perform an Air Assassination on a Poisoned NPC.
Discover the Assassin's Tomb inside the Torre Grossa.
Complete your first assassination mission for Lorenzo Il Magnifico.
Complete DNA Sequence 4.
Discover the Assassin's Tomb inside the catacombs under Santa Maria Novella.
Hide 5 dead bodies in a Bale of Hay.
Intercept a Borgia Courrier.
Find the 8 statuettes in Monteriggioni.
Upgrade a building in the Stronghold.
Complete DNA Sequence 3.
Complete DNA Sequence 2.
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.
Synchronize 10 View Points.
Pickpocket 1000 Florins.
Complete DNA Sequence 1.
Sprint for 100 meters.
Win a race against thieves!
Defend a woman's honor.
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.