3. Call of Duty: Modern Warfare 3 Story walkthrough

Single Player Campaign

Remember, this walkthrough is geared towards playing on veteran difficulty in the campaign to unlock all achievements in one playthrough. Since I have created videos for every mission, the text portion will not be in elaborate detail. If you are still having issues with a certain achievement, feel free to post up in the Walkthrough Forum.

ACT 1

'Back in the Fight' is unlocked by playing through the "Prologue". Just sit back and watch the cut sence.

Back in the Fight

Start the Single Player Campaign on any difficulty.

Back in the Fight
3 guidesOffline Game ModeSingle PlayerMain Storyline

The XM-25 is the grenade launcher that you start out with on 'Black Tuesday'. This one is easy to unlock since there are plenty of people to kill and you can refill your ammo once you get to the stock exchange building. There are 5 intel items in this mission(1-5). 'Too Big to Fail' is unlocked after you complete the mission 'Black Tuesday'.

This Is My Boomstick

Kill 30 enemies with the XM25 in "Black Tuesday."

This Is My Boomstick
6 guidesOffline Game ModeSingle Player

Too Big to Fail

Destroy the Jamming Tower. Complete "Black Tuesday" on any difficulty.

Too Big to Fail
1 guideOffline Game ModeSingle PlayerMain Storyline

'Wet Work' is unlocked by completing the mission 'Hunter Killer' where you are to capture the Russian command submarine. There are 2 intel items in 'Hunter Killer'(6-7). Once you take back New York, you unlock 'The Big Apple' achievement.

Wet Work

Take back New York Harbor. Complete "Hunter Killer" on any difficulty.

Wet Work
1 guideOffline Game ModeSingle PlayerMain Storyline

The Big Apple

Complete "Black Tuesday" and "Hunter Killer" on Veteran difficulty.

The Big Apple
2 guidesOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

You can earn the 'Strike' achievement the easiest in 'Persona non grata' mission. At the beginning when you are on the balcony, you can cook a grenade just before the enemy breaks down the doors in the courtyard. If timed just right, the grenade will explode in a group of about 6 people just as they walk into the courtyard. "What Goes Up.." is unlocked when you are controlling the UGV later on in the mission. There are 6 helicopters that you need to destroy with the grenade launcher. I would recommend not shooting them at all with the UGV's minigun. It takes 2 grenades to bring down a chopper and you start with 23, so use them sparingly on the soldiers just in case you miss a few times. There are 4 intels in 'Persona non grata'(8-11). 'Carpe diem' is unlocked by completing the mission.

Strike!

Kill 5 enemies with a single grenade in Single Player or Special Ops.

Strike!
11 guidesOnline/OfflineSingle PlayerCooperative

What Goes Up…

Destroy all the choppers with only the UGV's grenade launcher in "Persona Non Grata."

What Goes Up…
5 guidesOffline Game ModeSingle Player

Carpe Diem

Escape the mountain safe house. Complete "Persona Non Grata" on any difficulty.

Carpe Diem
1 guideOffline Game ModeSingle PlayerMain Storyline

The 'Flight Attendant' achievement is earned during the part of the mission where you are being tossed around the plane cabin due to the turbulance and there will be 5 enemies to kill before you are able to walk again. I would recommend having two automatic weapons on hand for this part as it happens rather fast. There are 2 intel items on "Turbulence"(12-13). 'Frequent Flyer' is unlocked by completing the mission.

Flight Attendant

Kill all 5 enemies during the zero-g sequence in "Turbulence."

Flight Attendant
8 guidesOffline Game ModeSingle Player

Frequent Flyer

Defend the Russian President. Complete "Turbulence" on any difficulty.

Frequent Flyer
1 guideOffline Game ModeSingle PlayerMain Storyline

'For Whom the Shell Tolls' is unlocked in a later part of the mission during the mortar sequence. There will be 4 targets labeled that you must destroy using only 4 mortar shells. 3 of the targets are Trucks and the 4th is a group of soldiers. There are 3 intel items on "Back on the Grind"(14-16). 'Up to no Good' is unlocked by complete this mission. 'Out of the Frying Pan' is unlocked by completing the two previous missions; "Persona non grata", "Turbulence", and "Back on the Grind".

For Whom the Shell Tolls

Destroy all targets during the mortar sequence with only 4 shells in "Back on the Grid."

For Whom the Shell Tolls
7 guidesOffline Game ModeSingle Player

Up to No Good

Infiltrate the village. Complete "Back on the Grid" on any difficulty.

Up to No Good
1 guideOffline Game ModeSingle PlayerMain Storyline

Out of the Frying Pan…

Complete "Persona Non Grata", "Turbulence", and "Back on the Grid" on Veteran difficulty.

Out of the Frying Pan…
2 guidesOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

There are 3 intel items on "Mind the Gap"(17-19). 'One Way Ticket' is unlocked by completing the mission.

One Way Ticket

Make it to Westminster. Complete "Mind the Gap" on any difficulty.

One Way Ticket
1 guideOffline Game ModeSingle PlayerMain Storyline

ACT 2

There are 3 intel items on this mission (20-22). After you find all 3, and if you have collected all of them up until this point, you will unlock the 'Informant' achievement for finding 22 intels. 'Welcome to WW3' is unlocked by completing the mission.

Informant

Collect 22 Intel Items.

Informant
4 guidesOffline Game ModeSingle PlayerCollectable

Welcome to WW3

Save the US Vice President. Complete "Goalpost" on any difficulty.

Welcome to WW3
1 guideOffline Game ModeSingle PlayerMain Storyline

'Kill Box' is earned when you are in control of the drone helicopter. The best part of the mission to unlock this one is when you can use it for a second time when you get up to the broken ship that is close the first building. There are 3 intel items on "Return to Sender"(23-25). 'SandStorm!' is unlocked by completing this mission. 'Payback' is unlocked for completing the previous missions and "Return to Sender".

Kill Box

Kill 20 enemies with the Chopper Gunner in a single run in "Return to Sender."

Kill Box
9 guidesOffline Game ModeSingle Player

Sandstorm!

Assault the shipping company. Complete "Return to Sender" on any difficulty.

Sandstorm!
2 guidesOffline Game ModeSingle PlayerMain Storyline

Payback

Complete "Mind the Gap", "Goalpost", and "Return to Sender" on Veteran difficulty.

Payback
1 guideOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

There are 4 intel items "Bag and Drag"(26-29).

Danger Close

Take down a chopper with an AC-130 smoke grenade in "Bag and Drag."

Danger Close
5 guidesOffline Game ModeSingle Player

Back Seat Driver

Track down Volk. Complete "Bag and Drag" on any difficulty.

Back Seat Driver
1 guideOffline Game ModeSingle PlayerMain Storyline

'Ménage à Trois' is unlocked during the AC-130 sequence. At this point in the mission, you are required to clear the area of enemy armor. You need to kill 3 tanks with one shot from the 105mm cannon. There will be a cluster of tanks shown in the video. It is best that you weaken the three tanks with the 40mm and 25mm cannons first and then deal the final blow with the 105mm. There are 2 intel items on "Iron Lady"(30-31). 'We'll Always Have Paris' is unlocked by completing "Iron Lady". 'City of Lights' is unlocked by completing the previous mission "Bag and Drag" as well as "Iron Lady".

Ménage à Trois

Destroy 3 tanks with a single 105mm shot in "Iron Lady."

Ménage à Trois
5 guidesOffline Game ModeSingle Player

We'll Always Have Paris

Escape Paris with Volk. Complete "Iron Lady" on any difficulty.

We'll Always Have Paris
1 guideOffline Game ModeSingle PlayerMain Storyline

City of Lights

Complete "Bag and Drag" and "Iron Lady" on Veteran difficulty.

City of Lights
1 guideOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

There are 2 intel items on "Eye of the Storm"(32-33).

Vive la Révolution!

Reach the church. Complete "Eye of the Storm" on any difficulty.

Vive la Révolution!
1 guideOffline Game ModeSingle PlayerMain Storyline



There is 1 intel item on "Blood Brother"(34).

Requiem

Escape the city. Complete "Blood Brothers" on any difficulty.

Requiem
1 guideOffline Game ModeSingle PlayerMain Storyline

ACT 3

There are 2 intel items on "Stronghold"(35-36). After you complete "Stronghold", you will unlock 'The Darkest Hour' for completing "Eye of the Storm", "Blood Brothers", and "Stronghold" missions.

Storm the Castle

Discover Makarov's next move. Complete "Stronghold" on any difficulty.

Storm the Castle
1 guideOffline Game ModeSingle PlayerMain Storyline

The Darkest Hour

Complete "Eye of the Storm", "Blood Brothers", and "Stronghold" on Veteran difficulty.

The Darkest Hour
1 guideOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

'Nein' is unlocked by killing 9 enemy soldiers with the A-10 Warhog airstrikes on "Scortched Earth". Killing the tanks do no count in the 9 kills. There are 5 intel items on "Scorched Earth"(37-41). 'Bad First Date' is unlocked by completing this mission.

Nein

Kill 9 enemies with A-10 strafing runs in "Scorched Earth."

Nein
4 guidesOffline Game ModeSingle Player

Bad First Date

Find the girl. Complete "Scorched Earth" on any difficulty.

Bad First Date
1 guideOffline Game ModeSingle PlayerMain Storyline

There are 2 intel items on "Down the Rabbit Hole"(42-43)

Diamond in the Rough

Rescue the Russian President. Complete "Down the Rabbit Hole" on any difficulty.

Diamond in the Rough
1 guideOffline Game ModeSingle PlayerMain Storyline

There are 3 intel items on "Dust to Dust"(44-46). 'Who Dares Wins', 'This is the End', and 'The Best of the Best' are unlocked by completing the single player campaign on veteran difficulty. If you were keeping up with your intels, you will have found the last 3 in "Dust to Dust".

Scout Leader

Collect 46 Intel Items.

Scout Leader
6 guidesOffline Game ModeSingle PlayerCollectable

Who Dares Wins

Complete the campaign on any difficulty.

Who Dares Wins
1 guideOffline Game ModeSingle PlayerMain StorylineStackable

This is the End

Complete "Scorched Earth", "Down the Rabbit Hole", and "Dust to Dust" on Veteran difficulty.

This is the End
1 guideOffline Game ModeSingle PlayerMain StorylineDifficulty Specific

The Best of the Best

Complete the campaign on Hardened or Veteran difficulty.

The Best of the Best
6 guidesOffline Game ModeSingle PlayerMain StorylineDifficulty SpecificStackable

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