They played three mp maps:
Snowbound
Highgrounds
Valhalla
ATV confirmed
other vehicle "man cannon"
weapons:
more powerful AR
Brute Spiker, shotgunnu thing shooting spikes
Spike grenade
Spartan Laser - anti-vehicle weapon
RB and LB to reload weapons, in left or right hand
You see the weapon a player's not using on his back
"X-button will be used for something that will "change the whole game", but Bungie isnt ready to say for what."
New vehicle: Man Cannon
"A new transport vehicle in Multiplayer, with a built in catapult that sends the player "100's of feets up in the air, the player can still shoot when he's in the air.
A new kind of energy shield (read bunker). It resists all kinds of bullets and rockets, but players can go right through. (Think Star Wars Episode 2)
New Weapon: Nail Grenade
New grenade that stucks on walls, when it explodes it sends out thousands of nails.[/b]