Captain MacTavish will accompany you on this mission. Follow him to the spot where you'll begin to climb #1. You use the ice axes by holding down the right/left mouse button. Once on the top, take a run-up and jump to the other side #2. You will almost fall, but the captain will save you. Climb up higher.
Run forward and you'll learn about an interesting function of your weapon - a pulse sensor #1. When it's active it will display the enemy location as white dots. You will encounter two enemies #2, your target will be the one on the left - try to shoot together with the captain, so that you will eliminate both enemies at the same time.
A little further the situation will repeat - once more take care of the enemy on the left #1. Once you get into the blizzard, you will have to move alone. Your companion will help you from time to time, eliminating some of the enemies. The blizzard will allow you to stay invisible #2, try not to get too close to the enemies. Head towards the fuel station, where you will mount the charges.
Try to stay invisible, you don't have to eliminate all of the enemies - in fact you don't have to worry about it at all, captain MacTavish will take some down for you. Remember to have the pulse sensor active. On your way you will encounter a truck #1, hide somewhere for a while. Right before the landing zone there is a patrol formed by four enemies #2.
Stop for a while by the plane, you will be warned about a high activity by the runway. Run to the fuel station and set the charges #1. Quickly go to the hangar, where the satellite is. You can run all the way, just look out just before the hangar, where the blizzard is stopping. Go to the side of the hangar and you'll meet with the captain #2.
There will be no surprise inside, head upstairs where your man objective is #1. While going back, your partner will be surrounded #2. Don't get out of the cover! It's time for plan B - detonate the charges by the fuel station before major Petrov ends the countdown - hell will break loose.
Shoot some enemies and follow the captain. After getting to the cover, run to the MIG #1 - don't worry about the opponents, those nearby the plane will die of its explosion and MacTavish will take care of the rest. The enemies on the left, hiding by the car, can pose a threat #2.
Run to the fault marked on the screen. Try to shoot some enemies on snow scooters. If you don't - nothing will happen really. After getting down, turn around and eliminate some enemies above #1. After a while more scooters will appear - eliminate the drivers and get on one of them #2.
You will have a crazy ride between trees and a whole lot of enemies chasing you #1. You will have a semi-automatic pistol, which will deal with the enemies quickly. Look out for the helicopter, while driving through the frozen lake. In the end you will have to make a jump over a gap #2 and join the rest of the team.