I'm at the first stage of the Hoth mission, which was trying to get into Echo Base. I'm stuck, though. I keep coming to an AT-AT(or is it ST?) in front of a door and I can't kill it. I just need to know how to get in there.
To kill the AT-ST( i think that is it) use that gun placement and shoot it up. To get into Echo Base, find the bunker thing and go inside. there will be a few snowtroopers here. kill em and then there is a ladder leading down into a room below with more snowtroops. Slice and dice and enter the hole. Then you'll go to your briefing thing for part 2.