Assassins Creed Brotherhood Ps3 -

Combat w/ the knife, sword and mace is dual-wielded, throwing knives and hidden gun
Kill-streak feature allows Ezio to move from enemy to enemy using melee weapons
Carry heavy weapons after upgrading his sheath, hurl at enemies for instant kill.
Crossbow has also been added to Ezio's arsenal, allowing silent ranged takedowns.
Ezio can now call for and take a horse through city districts rather than just the countryside.