Assassin's Creed 2 Cheats

Unlock Feather Rewards
Condottiero War Hammer - Collect 50 feathers to unlock it
Auditore Cape - Collect 100 feathers to unlock it

Achievements
You'll have to accomplish the indicated achievement to get the corresponding number of Gamerscore points:
An Old Friend Returns (100 points) - Escape the hideout.
The Pain of Betrayal (30 points) - Complete DNA Sequence 1.
Vengeance (30 points) - Complete DNA Sequence 2.
Exit the Son (30 points) - Complete DNA Sequence 3.
Bloody Sunday (30 points) - Complete DNA Sequence 4.
The Conspirators (30 points) - Complete DNA Sequence 5.
An Unexpected Journey (30 points) - Complete DNA Sequence 6.
Bleeding Effect (30 points) - Complete training and reenter the Animus.
The Merchant of Venice (30 points) - Complete DNA Sequence 7.
The Impenetrable Palazzo (30 points) - Complete DNA Sequence 8.
Masquerade (30 points) - Complete DNA Sequence 9.
Bianca's Man (30 points) - Complete DNA Sequence 10.
The Prophet (30 points) - Complete DNA Sequence 11.
The Vault (30 points) - Complete DNA Sequence 14.
Podest of Monteriggioni (30 points) - Reach 80% of your stronghold's total value.
Wetland Ebony and Wetland Ivory (30 points) - In Memory of Petruccio
Doctor (20 points) - Perform an Air Assassination on a Poisoned NPC.
No-hitter (20 points) - Kill 10 enemies while remaining in conflict without being hit.
The Birth of an Assassin (20 points) - Be reborn as Ezio Auditore Da Firenze.
Arrivederci Abstergo (20 points) - Break out of Abstergo.
Welcome to the Animus 2.0 (20 points) - Enter the Animus 2.0.
Undertaker (20 points) - Discover the Assassin's Tomb inside the catacombs under Santa Maria Novella.
Vitruvian Man (20 points) - Unlock all 20 pieces of Subject 16's video.
Venetian Gladiator (20 points) - Discover the Assassin's Tomb inside Santa Maria della Visitazione.
I can see your house from here! (20 points) - Discover the Assassin's Tomb inside the Torre Grossa.
Hallowed be thy name (20 points) - Discover the Assassin's Tomb inside the Basilica di San Marco.
Prison Escape (20 points) - Discover the Assassin's Tomb inside the Rocca di Ravaldino fortress.
Choir Boy (20 points) - Discover the Assassin's Tomb inside Santa Maria del Fiore (The Duomo).
Messer Sandman (10 points) - Stun 4 guards at once by throwing sand in their face.
Street Cleaner (10 points) - Hide 5 dead bodies in a Bale of Hay.
Kleptomaniac (10 points) - Pickpocket 1000 Florins.
Lightning Strike (10 points) - Sprint for 100 meters.
Sweeper (10 points) - Sweep 5 guards at once by using a Long Weapon.
Assassin For Hire (10 points) - Complete your first assassination mission for Lorenzo Il Magnifico.
Macho Man (10 points) - Defend a woman's honor.
Steal Home (10 points) - Win a race against thieves!
Show your Colors (10 points) - Wear the Auditore cape in each city.
Handy Man (10 points) - Upgrade a building in the Stronghold.
I like the view (10 points) - Synchronize 10 View Points.
High Dive (10 points) - Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.
Perfect Harmony (10 points) - Tint your clothes with those colors
Mailman (10 points) - Intercept a Borgia Courrier.
Tip of the Iceberg (10 points) - Use your Eagle Vision to scan a Glyph in the environment.
A Piece of the Puzzle (10 points) - Unlock a piece of Subject 16's video.
Collect all the Feathers. - Red Light Addict (10 points)
Spend 5000 florins on Courtesans. - Man of the People (10 points)
Toss more than 300 florins on the ground. - Victory lies in preparation (10 points)
Art Connoisseur (10 points) - Buy a Painting from Florence and Venice.
Myth Maker (5 points) - Find the 8 statuettes in Monteriggioni.
Fly Swatter (5 points) - Kick a Guard while using the Flying Machine.