Successfully complete the game.

Best Class

In my opinion, this is the best class to use:

Primary Weapon: M16A4 Attachment:Acog Scope
Side Weapon: M1911 Pistol (or Desert Eagle, which ever one you have or prefer) No Attachment
Special Grende: Stun
Perk 1: Bandolier, Claymore, 3xFrag or 3xSpecial Grenade
Perk 2: UAV Jammer, Overkill or Sleight Of Hand
Perk 3: Martydom, Last Stand, Extreme Conditioning or Deeper Penetration

If you have any questions or want a battle sometime add me. PSN Name: MikeyJoe1404 (no spaces) Good Luck

Best shipment class

This is the best shipment class ever:

PRIMARY WEAPON: M4 CARBINE
SIDE ARM: M1911.(OR DESERT EAGLE IF YOU HAVE ONE)
SPECIAL GRENADE: SMOKE
PERK 1:FRAG X3
PERK 2:SONIC BOOM
PERK 3:MARTYDOM

THIS IS THE BEST AS SONIC BOOM IS HIGHER EXPLOSIVE DAMAGE!!! IF U LIKE U CAN ADD ME ON PSN: DRUMMER_A5H

Best weapon set

Best weapon set in my opinion:

main gun g3 attachment:acog scope
sidearm: silenced m9
special nade: stun
perk 1: claymore
perk 2: uav jammer it is very good in hardcore and normal search and destroy
perk 3: deeper penetration or extreme conditioning or last stand

Better accuracy

Once you get the Red Dot Scope addon to your weapons, use it over the ACOG scope. The red dot will not enhance or take away anything and provides a better aimpoint on most weapons. The ACOG scope will actually add more range to your weapon, but take away accuracy which accomplishes almost nothing; especially so for snipers because it takes away range and adds nothing.

Cheat mode

Successfully complete the game. A “Cheat” option will now appear during game play at the “Options” menu.

Cheat options

Collect the Intel Pieces (enemy laptop computers) hidden throughout the game to unlock the cheat options. The number of pieces you have determines which specific cheats are available.

CoD Noir: 2 Intel Pieces. Allows black and white graphics.
Photo-Negative: 4 Intel Pieces. Inverts the colors.
Super Contrast: 6 Intel Pieces. Increases the contrast.
Ragtime Warfare: 8 Intel Pieces. Silent movie mode.
Cluster Bombs: 10 Intel Pieces. When a frag grenade explodes, four more will explode in a cross-shaped pattern.
A Bad Year: 15 Intel Pieces. Enemies explode into tires when shot.
Slow-Mo Ability: 20 Intel Pieces. The game slows to half speed when you melee.
Infinite Ammo: 30 Intel Pieces. Reloads are no longer necessary. This has no effect with single-shot weapons such as RPGs, C4, or Claymores.

Crew Expendable: Desert Eagle

In the second large containment room, run ahead of your team. There are two enemies with Desert Eagles who will try to surprise you around two corners, depending on the path you take.

Epilogue mission

Successfully complete the game and watch the entire credits to unlock the bonus Epilogue mission.

Faster experience

To level up quicker than usual, try to use the same gun until all the marksman and elite challenges are completed. They provide huge boosts and will quickly level you up to get new guns. However, do not use those guns yet. Just keep on the challenge until it has completed. The third phase of the challenge usually ends with 1,000 experience points and that will bump you up a rank almost in itself. Also, do not forget about the strange challenges like jumping 15 feet and surviving or falling 30 feet to your death. To get that one if not previously unlocked play the “Countdown” map and jump into one of the open missile silos. You will get instant experience points for simply dying. Also, remember to go prone and crouch to get those challenges as well.

To level up, gain points, and to complete challenges easily, find a TDM game of the map “Shipment”, preferably with a lot of people. Make sure you have the Steady Aim/Martyrdom/Stopping Power perks on and choose a gun you want to level up. Shipment is a very small close shoulder-to-shoulder map. Just run around holding down the trigger, taking down as many people as possible. This is very fast paced and you should tick points very quickly.

Game Over: SSgt. Griggs’s “Success!” comment

Killing all three RPG enemies in the pursuing trucks in Game Over results in SSgt. Griggs saying “Success!”.

Golden weapons

Complete the indicated task to unlock the corresponding golden weapon camouflage.

Golden Ak-47: Complete all Assault Rifle challenges.
Golden Desert Eagle: Reach level 55.
Golden Dragonuv: Complete all Sniper challenges.
Golden M1014: Complete all Shotgun challenges.
Golden M60: Complete all LMG challenges.
Golden Mini-Uzi: Complete all SMG challenges.

Intel Pieces

The Intel Pieces can be found in the following levels. There are a total of thirty Intel Pieces.

Level 2: 2 Intel Pieces
Level 4: 2 Intel Pieces
Level 5: 3 Intel Pieces
Level 6: 2 Intel Pieces
Level 7: 2 Intel Pieces
Level 9: 3 Intel Pieces
Level 10: 2 Intel Pieces
Level 12: 2 Intel Pieces
Level 13: 3 Intel Pieces
Level 14: 2 Intel Pieces
Level 16: 2 Intel Pieces
Level 17: 1 Intel Piece
Level 18: 2 Intel Pieces
Level 19: 2 Intel Pieces

m14 and m21

m14s and m21s are basically the same but one has a scope, if you get acog on both of them then they are identical but the m14 having more ammo. m21s are a usfel sniper rifle as having no recoil you can fire a lot of bullets into the enemy very quickly.

Mile High Club mission

Complete Story mode under any difficulty setting.

Multiplayer Weapons

Unlockable multiplayer weapons are based on your Rank you receive. As you gain in rank, you will gain the ability for more and more weapons.

Multi-player: Headshots

When you kill another player with a headshot, a metal “ping” sound will play to confirm it.

Prestige mode

Reach level 55 to unlock Prestige mode. This is a multiplayer-only mode that starts you again at level 1. You can repeat this ten more times.

Rank bonuses

Reach the listed rank in Multi-player mode to unlock the corresponding bonus.

Private
Level 1: All starting equipment
Level 2: Demolitions Class Weapon Class
Level 3: Sniper Class Weapon Class

Lance Corporal
Level 4: Create a Class
Level 5: Gun Challenges
Level 6: New playlists

Corporal
Level 7: M40 Sniper Rifle
Level 8: Last Stand Perk Class 3
Level 9: Boot Camp Challenges 1

Sergeant
Level 10: M4 Carbine Assault Rifle
Level 11: UAV Jammer Perk Class 2
Level 12: Clan Tag

Staff Sergeant
Level 13: Mini Uzi Submachine Gun
Level 14: Bomb Squad Perk Class 1
Level 15: Boot Camp Challenges 2

Gunnery Sergeant
Level 16: M1911 Pistol
Level 17: Martyrdom Perk Class 2
Level 18: Boot Camp Challenges 3

Master Sergeant
Level 19: M60E4 Light Machine Gun
Level 20: Sleight of Hand Perk Class 2
Level 21: Operations Challenges

Master Gunnery Sergeant
Level 22: Dragunov Sniper Rifle
Level 23: Claymore Perk Class 1
Level 24: Operations Challenges 2

2nd Lieutenant
Level 25: G3 Assault Rifle
Level 26: Iron Lungs Perk Class 3
Level 27: Operations Challenges 3

1st Lieutenant
Level 28: AK-74U Submachine Gun
Level 29: Double Tab Perk Class 2
Level 30: Killer Challenges

Captain
Level 31: M1014 Shotgun
Level 32: Bandolier Perk Class 1
Level 33: Killer Challenges 2

Major
Level 34: R700 Sniper Rifle
Level 35: Eavesdrop Perk Class 3
Level 36: Killer Challenges 3

Lieutenant Colonel
Level 37: G36C Assault Rifle
Level 38: Overkill Perk Class 2
Level 39: Killer Challenges 4

Colonel
Level 40: P90 Submachine Gun
Level 41: Frag x 3 Perk Class 1
Level 42: Humiliation Challenges

Brigadier General
Level 43: Desert Eagle Pistol
Level 44: Dead Silence Perk Class 3
Level 45: Humiliation Challenges 2

Major General
Level 46: M14 Assault Rifle
Level 47: Humiliation Challenges 3
Level 48: Humiliation Challenges 4

Lieutenant General
Level 49: Barret Sniper Rifle
Level 50: Humiliation Challenges 5
Level 51: Elite Challenges

General
Level 52: MP44 Assault Rifle
Level 53: Elite Challenges 2
Level 54: Elite Challenges 3
Level 55: Commander Prestige Mode and Golden Desert Eagle

Scopes

When you have unlocked the acog and the steady aim perk, you can put the acog scope on the weapon with the steady aim perk. When in game zoom in and the sight will be almost perfect! I use it on the M4 but you don’t have to. but that’s your choice (sorry for spelling errors)

Sniping

If a target is moving make sure to lead it. If you are not making shots try to lead your target more. Also, if you are a skilled sniper try using the M40A3 over the M21. It has a slower reload time and rate of fire, but it has enough damage to kill a target in one shot instead of two or three. It also allows you to be less noticeable with less rounds being fired; so someone else cannot follow the tracer shot back to you. A good setup for the sniper is the Claymore perk, to alert you when an enemy is trying to close in on your rear, and either the Sleight Of Hand or Stopping Power, then Iron Lungs to give you more time to line up your shots.

Sniping spots

These are the best sniping spots on the game that i have used. If any you use that i havent mentionted tell me on psn (drummer_a5h).

BONUS MAPS:

CREEK: corner of the house with a hole in the side.

BROADCAST: the house with a ladder leading into it near the car park, go prone.

CHINATOWN: the big grass area where sas start or the house with the mounted gun.

KILLING HOUSE: —none—

NORMAL MAPS:

AMBUSH: any building that you can get on the top floor to.

BACKLOT: the building opposite the building yard with the mounted gun.

BLOC: both buildings.

BOG: either end, go prone.

COUNTDOWN: on top of the launch pads.

CRASH: on the top roof of the biggest building*. (*everyone goes here)

DISTRICT: THE TOP CORNER OF THE MAP

OVERGROWN:anywhere where there is high grass

SHIPMENT:—none—

SHOWDOWN:the top floor of the whole building.

VACANT: the far end where all the containers are.

WETWORK: the buildings at both ends

The Best class

In my opinion this is the best possible class:

Main gun: M4
Pistol: USP.45
Special Grenade: Flash
Perk 1: Frag x3
Perk 2: Stopping power
Perk 3: Martydom