Attend the final ceremony.

Purchase the Trigger Bomb from ThiefNet

Purchase the Snooze Bomb from ThiefNet

Kill 4 enemies simultaneously with one explosion (Single Player only).

Tag 25 enemies using the camera (Single Player only).

Purchase the Combat Dodge from ThiefNet

Defeat Dimitri

Replace a painting undercover

Collect 100 coins

Collect 20 clue bottles

Escape from Carmelita

Get all Hidden Blades, Item Pouches and Armor upgrades for Ezio.