What level do you kill the gient worm I think it's level 3 but that thing..

Well you don't have to it is pretty easy to run across the map and there is aboss just inside the building on the other side of the map

Yeah, it's level three. The worm is giddy difficult to kill. You have to shoot, and burst the yellow circle energy things you see on it, when it only has a couple left, the worm dies.

I is level 3, but it come back over and over for you to kill again, just watch for it to kinda "jump" out of the ice and fall over and leave a thermal pool, then head for the north east corner of the map and go into that building around there and destroy the boss there.

It takes way too long to kill... Just run across to the building.... Don't use a vehicle it jumps up and destroys it...

But if you really want to kill it there are the thermal weak spots near it's head and along it's body

it's on that level and all you have to do is get the laser gun on the vs were the snow is going down an shoot the thermal glands and shoot it in it's mouth use health cheat (3x down,up,y,up,y,up,y, 3x up,down,xdown,x,down,x,left,y,right,x,left,y,right,x,lb rb

You can either use the unlimited health cheat and run from it to the other side of the map (wayyy faster) or you can kill it. To kill it:
Just like normal Akrid it will have a weak point, but it has like 8 patches you must shoot. Each one will blow up and you need make sure they all explode then after that it should die I think.