Call of Duty: Modern Warfare 3 Walkthrough

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 Fight5 (5)

Start the Single Player Campaign on any difficulty.

• Unlocked by 98,076 tracked gamers (93% - TA Ratio = 1.04) 105,875

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 Boomstick32 (20)

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

• Unlocked by 41,566 tracked gamers (39% - TA Ratio = 1.60) 105,875

Too Big to Fail11 (10)

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

• Unlocked by 93,857 tracked gamers (89% - TA Ratio = 1.06) 105,875

'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 Work11 (10)

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

• Unlocked by 91,503 tracked gamers (86% - TA Ratio = 1.08) 105,875

The Big Apple38 (25)

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

• Unlocked by 45,026 tracked gamers (43% - TA Ratio = 1.53) 105,875

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!32 (20)

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

• Unlocked by 40,613 tracked gamers (38% - TA Ratio = 1.61) 105,875

What Goes Up…33 (20)

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

• Unlocked by 39,238 tracked gamers (37% - TA Ratio = 1.64) 105,875

Carpe Diem11 (10)

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

• Unlocked by 89,169 tracked gamers (84% - TA Ratio = 1.09) 105,875

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.

Secret Achievement35 (20)

Continue playing to unlock this secret achievement. (Secret)

Show secret details

• Unlocked by 34,166 tracked gamers (32% - TA Ratio = 1.76) 105,875

Frequent Flyer11 (10)

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

• Unlocked by 87,664 tracked gamers (83% - TA Ratio = 1.10) 105,875

'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 Tolls32 (20)

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

• Unlocked by 40,621 tracked gamers (38% - TA Ratio = 1.61) 105,875

Up to No Good11 (10)

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

• Unlocked by 86,013 tracked gamers (81% - TA Ratio = 1.11) 105,875

Out of the Frying Pan…40 (25)

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

• Unlocked by 41,482 tracked gamers (39% - TA Ratio = 1.60) 105,875

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

One Way Ticket11 (10)

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

• Unlocked by 84,289 tracked gamers (80% - TA Ratio = 1.12) 105,875

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.

Informant35 (20)

Collect 22 Intel Items.

• Unlocked by 34,846 tracked gamers (33% - TA Ratio = 1.74) 105,875

Welcome to WW311 (10)

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

• Unlocked by 82,440 tracked gamers (78% - TA Ratio = 1.13) 105,875

'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 Box30 (20)

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

• Unlocked by 46,997 tracked gamers (44% - TA Ratio = 1.50) 105,875

Sandstorm!11 (10)

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

• Unlocked by 81,194 tracked gamers (77% - TA Ratio = 1.14) 105,875

Payback41 (25)

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

• Unlocked by 39,392 tracked gamers (37% - TA Ratio = 1.64) 105,875

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

Danger Close30 (20)

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

• Unlocked by 46,427 tracked gamers (44% - TA Ratio = 1.51) 105,875

Back Seat Driver12 (10)

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

• Unlocked by 79,730 tracked gamers (75% - TA Ratio = 1.15) 105,875

'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 Trois32 (20)

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

• Unlocked by 42,114 tracked gamers (40% - TA Ratio = 1.59) 105,875

We'll Always Have Paris12 (10)

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

• Unlocked by 79,088 tracked gamers (75% - TA Ratio = 1.16) 105,875

City of Lights41 (25)

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

• Unlocked by 38,546 tracked gamers (36% - TA Ratio = 1.66) 105,875

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

Vive la Révolution!12 (10)

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

• Unlocked by 78,147 tracked gamers (74% - TA Ratio = 1.16) 105,875

Requiem12 (10)

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

• Unlocked by 77,771 tracked gamers (73% - TA Ratio = 1.17) 105,875

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 Castle12 (10)

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

• Unlocked by 77,041 tracked gamers (73% - TA Ratio = 1.17) 105,875

The Darkest Hour42 (25)

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

• Unlocked by 37,912 tracked gamers (36% - TA Ratio = 1.67) 105,875

'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.

Nein36 (20)

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

• Unlocked by 31,966 tracked gamers (30% - TA Ratio = 1.82) 105,875

Bad First Date12 (10)

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

• Unlocked by 76,194 tracked gamers (72% - TA Ratio = 1.18) 105,875

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

Diamond in the Rough12 (10)

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

• Unlocked by 75,730 tracked gamers (72% - TA Ratio = 1.18) 105,875

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 Leader72 (35)

Collect 46 Intel Items.

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• Unlocked by 25,108 tracked gamers (24% - TA Ratio = 2.05) 105,875

Who Dares Wins47 (40)

Complete the campaign on any difficulty.

• Unlocked by 75,358 tracked gamers (71% - TA Ratio = 1.19) 105,875

This is the End42 (25)

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

• Unlocked by 36,913 tracked gamers (35% - TA Ratio = 1.69) 105,875

The Best of the Best157 (100)

Complete the campaign on Hardened or Veteran difficulty.

• Unlocked by 42,879 tracked gamers (40% - TA Ratio = 1.57) 105,875