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.
Unlock all 20 pieces of Subject 16's video.
Discover the Assassin's Tomb inside the Basilica di San Marco.
Sweep 5 guards at once by using a Long Weapon.
Wear the Auditore cape in each city.
Collect all the Feathers.
Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Discover the Assassin's Tomb inside the Torre Grossa.
Escape the hideout.
Complete DNA Sequence 14.
Stun 4 guards at once by throwing sand in their face.
Win a race against thieves!
Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.
Complete DNA Sequence 11.
Spend 5000 florins on Courtesans.
Complete DNA Sequence 10.
Tint your clothes with those colors: Wetland Ebony and Wetland Ivory.
Perform an Air Assassination on a Poisoned NPC.
Toss more than 300 florins on the ground.
Complete DNA Sequence 9.
Discover the Assassin's Tomb inside Santa Maria della Visitazione.
Reach 80% of your stronghold's total value.
Complete DNA Sequence 8.
Kill 10 enemies while remaining in conflict without being hit.
Kick a Guard while using the Flying Machine.
Find the 8 statuettes in Monteriggioni.
Complete DNA Sequence 7.
Hide 5 dead bodies in a Bale of Hay.
Pickpocket 1000 Florins.
Buy a Painting from Florence and Venice.
Complete training and reenter the Animus.
Complete DNA Sequence 6.
Complete your first assassination mission for Lorenzo Il Magnifico.
Complete DNA Sequence 5.
Discover the Assassin's Tomb inside Santa Maria del Fiore (The Duomo).
Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.
Complete DNA Sequence 4.
Intercept a Borgia Courrier.
Discover the Assassin's Tomb inside the catacombs under Santa Maria Novella.
Upgrade a building in the Stronghold.
Complete DNA Sequence 3.
Synchronize 10 View Points.
Complete DNA Sequence 2.
Sprint for 100 meters.
Unlock a piece of Subject 16's video.
Use your Eagle Vision to scan a Glyph in the environment.
Complete DNA Sequence 1.
Defend a woman's honor.
Enter the Animus 2.0.
Break out of Abstergo.
Be reborn as Ezio Auditore Da Firenze.