"Infiltrate an oilrig captured by the Russians. Free the hostages and neutralize enemy forces to allow U.S. troops to disable the SAM sites, clearing the route to the Gulag"
After escaping the favela, General Shepherd tells John "Soap" MacTavish that he and his group are now heading for Prisoner six-two-seven (627) in a joint ops with Navy SEALs to get a step closer to getting to Vladimir Makarov However, SAM sites are preventing them from getting to the gulag where he is held, so they have to take out the SAM sites first The SAM sites are located at oil rigs held down by Russian forces.
As the Russians have civilian hostages, they have to neutralize the oil rig carefully They stealthily assault the least defended oil rig with 6th Fleet After a small submarine ride, the group will arrive at the bottom of the rig, where Roach and Soap take down two guards After going one floor up, they breach a room with five hostages, saving them.
Then they move up and breach another room, again saving a few hostages However, as a Russian radio voice can be heard, Soap tells others to set up a Plan B by putting C4 on the bodies in the room Soap and Roach then go to a construction balcony and watch Russian forces enter the room only for them to notice their killed men and alert others At this moment, Roach will detonate the C4 They will then go loud, and everyone have also removed their silencers.
They proceed step by step two floors up, until they notice that Russians are using smoke grenades, as well as thermal optics to see through the smoke Soap will tell others to use thermals as well After taking down the enemies, the group will breach a final room of enemies, where there is also barrels with C4 around them After saving the hostages, Soap will report to Overlord that the rig is now clear.
Then they go to a helipad, where an MH-6 Little Bird is waiting After leaving on it towards the gulag, Roach sees Marines taking control of the rig.