new vehicles and weapons, there is a cool feature where you can deploy things and have added extra's such as a bubble shield, literally a big bubble, penetratable only by a person, great to use when in trouble, buys you time to regen. active camo - deployable rather than automatic when you pick it up. new grenades which rule. unlockable appearance changing things such as armour, turrets can be detatched from their stands, flamethrower, and missile turrets can all be detatched and carried, given it slows you down but they are great fun, the grav hammer is a great new close combat weapon, 1 hit kills
online ranking system, private sergeant etc etc, cool new game types, rumble pit, awesome new maps.... better interactive scenery, great storyline too
hope this helped... if you get online, message me - maybe we could play...