Over Reactor

Over Reactor is a Special Ops mission in Call of Duty: Modern Warfare 3. It requires the player to infiltrate a sumbarine in danger of having its nuclear reactor meltdown and then escape on a helicopter.

Overview
The player begins by landing ont he submarine's exterior via helicopter. The player is immediately assaulted by two soldiers. After dispatching them, the player must defuse a thermite charge and enter the sumbarine. After traversing several maze-like floors littered with enemies, the player must stabilize the reactor and proceed to escape. After traveling up a ladder and back onto the submarine's exterior, the player will be assaulted by a large force of soldiers rappelling in from helicopters with the aide of smoke grenades. After dispatching the soldiers, the player must hold off on the submarine until a helicopter arrives to exfil the player, completing the mission.