The level begins as your character, Gary "Roach" Sanderson, and"Soap" MacTavish are on a ledge on the side of a mountain. After a MiG-29 flies overhead you and Soap start climbing a wall of ice with ice picks. There is a harrowing moment when a pair of MiG-29s fly overhead, nearly dislodging Soap from his position on the cliff. Once at the top you and Soap jump a small gap. You don't make it and nearly fall to your death when Soap grabs your hand at the last moment, saving your life. Soap brings you up, and you climb up the rest of the mountain. The two are then seen moving up to a fuel depot. They simultaneously take out enemy troops and move up to the fuel depot. You then infiltrate the airbase and proceed to the fuel depot, killing people as you go along at your discretion, as you can sneak by enemies using the cover of the blizzard and the usefulness of the heartbeat sensor. You will then plant C4 on the fuel depot and travel to the hanger that Soap is in to destroy a crashed satellite. If you do this without alerting or killing any guards you will receive the achievement/trophy"Ghost". When you and Soap go in the hanger, a guard walks by and Soap beats up and stabs the unfortunate guard in the neck with his knife. He tells you to go upstairs and get the ACS module. When you come back, you hear Major Petrovtelling you to surrender or he will kill Soap, so you detonate the C4. There is a huge explosion and you and Soap fight out of the airbase and go down a hill where Soap takes out an oncoming enemy snowmobile with his ice picks. You and Soap then get on the snowmobiles and escape while shooting enemies, racing down a really steep hill and jumping across a gorge to get to the LZ where Kilo Six-One is waiting.

Intel

• Intel No. 4 is near the entrance of the base; to your right is a tower with a ladder and scaffold; watch out for the enemy patrol and climb the ladder to find the laptop.
• Intel No. 5 is easy to miss; just before regrouping with Soap, there is a building where welders can be seen working on a MiG through a window. Smash one of the windows and a laptop is on the other side.
• Intel No. 6 is very easy to miss, as it is found during the snowmobile chase. At about 1850m from the extraction point, the path will split off to the left or right. Head for the trees in the middle and veer right. Drive over the laptop to pick it up.