Hit the switches at E5 so you can hit the switches at D5 and F5
Kill the enemies at E4 to unlock the teleporters
Only really need to kill the Oodan and Za Oodan
Use a teleporter to arrive at the square area (A2,A3,B2,B3)
Kill everything in the square area to unlock teleporters
Use the teleporter to go to E3 and destroy the first rock
Go back into the teleporter and go to E4
Use the left and right teleporters to go to D4 and F4
Cut the grass to reveal the switch Hit the switch and use the teleporter to E3 (Repeat if solo)
Follow the left wall to avoid traps and go to E1
Kill the Rockbear and move to next area
Area 2
<-Start at C6:
Hit the switches at C5 (if solo or duo do all of the below but leave going left for after step 4)
One player goes right (on map) to D3 to hit the switch. One goes left (on map) to kill everything in B5 and A5 to hit the switches in both (hidden in snow).
Remaining players kill everything in C5 to unlock teleporters on A5 and D3