Perform the following actions to unlock additional capes for Ezio. You can wear capes by equipping them in the Inventory menu.
Auditore Cape - Repair everything to get 100% on Rebuilding Rome
Borgia Cape - Collect the 100 Borgia Flags
Medici Cape - Play Assassin's Creed: Project Legacy (a Facebook game) and get to Level 30 / you must link your gamer profile to your Facebook page
Venetian Cape - Play Assassin's Creed: Project Legacy (a Facebook game) and get to Level 30 / you must link your gamer profile to your Facebook page