Call of Duty 4: Modern Warfare/Crew Expendable

Objectives

 * Secure the Package
 * Pick Up the Manifest
 * Get off the Ship

Secure the Package
You will fly in a helicopter to the ship, you will unload and will be facing a bridge like the one in the training level, but with real people, take them out then go down the stairs, a drunk man will be stumbling, kill him then go right and take out the two sleeping enemies in the room, there will be a piece of enemy intelligence so grab it and then continue.

Note: If you want to get the achievement, kill the drunk guy and the sleeping guys with your knife instead of your guns. It's easiest doing it here as they won't strike back.

You will go outside the ship, follow the staircase down and go along, at the second bridge, you will see two enemies with flash lights, wait for your team then take them out, go along and a lot of enemies will come in the top windows of the ship, you can take a few out or crouch and wait for the helicopter to take them out, then follow your squad to the door.

Go in and follow them, after you go down the stairs, you will see a passageway to the right, down there, there are 3 enemies. Wait for your squad and kill them then keep going until you get to a door, wait for your squad mates to go before you go or you will be shot, as you go down, there will be another piece of intelligence. Follow your squad onto the second part of the hold.

Wait, then go left up the stairs, on the other side, there will be 3 enemies, kill them then go across and stand at the top of the stairs, shoot down at the enemies then go down to your squad, keep with them and prepare for the third room.

Stand to the right of the door, then go in and crouch on the right and side, behind the container, there are 2 enemy forces, some to the left and some in front of you, pick off a few in front of you. Then go forward when no-one is firing at you from the front, crouch near the container to the left so people to the left can't see you, when you reach the area where the enemies were, go left and you can easily kill all of the enemies there from behind. Be careful, as one of the containers will pop open and an enemy with an AK will fire at you. In Veteran mode, if you are not prepared you will likely be killed instantly.

Go to the container, pick up the manifest and prepare to escape from the ship.

Get off the Ship
On the stairway, stay to the wall as it will keep you safe, listen to where your comrades tell you to go and when you get to the helicopter, jump when it says to, Captain Price will pull you up and the mission will end.