Reach Level 31 in Multiplayer mode for a weapon by getting 1,000 kills with it to unlock the Gold camo for the weapon.
Secret killstreak
Get a 25 (24 with Hardline) killstreak using only your gun/knife/equipment (killstreak kills do not count) to get a M.O.A.B. (Mother Of All Bombs). When activated, it will kill all enemies on the map, no matter where they are, as well as disable the enemy's equipment, electronics, and pointstreaks for one minute. Additionally, the team with the person who calls in a M.O.A.B. will get double XP for the rest of the match.
Easy XP
Once you reach Level 20 in Multiplayer mode, use the Specialist Killstreak package to get a lot of extra XP. Create a class with the Hardline perk and use the Specialist Killstreak package. You will get extra points at kills 1, 3, 5, and 7. It will also help you complete the perk's challenges and the Specialist challenges for each perk. You will be completing the perks, and each perk has a Specialist perk challenge to it. For example, if at one kill you unlock Assassin, you will be completing Assassin challenges while also completing the "Assassin" Specialist challenge. You will get a lot of XP as you complete these challenges in addition to the 200 XP you get for kills 1, 3, 5, and 7 each time. This works best in modes where you get a lot of kills. Additionally, you get extra points for kills 8, 9, 10, etc. as long as you have all the perks enabled and have not died.
Easy Blast Shield Pro
Throw a Flash or Concussion grenade at the wall so it bounces back at you and stuns you. It will be counted as deflecting an explosion for the Blast Shield Pro. Note: This glitch was done on an unpatched version of the game.
Easy SitRep Pro
Once you unlock the Trophy System tactical equipment, assign it to a class, and deploy it. Then, knife it, and it will count towards destroyed enemy equipment for the SitRep Pro. Note: This glitch was done on an unpatched version of the game.
Reducing lag
At the multiplayer main menu, select "Options", then disable the "Theater Recording" option to help reduce lag during online games.
Multiplayer unlockables
Reach the indicated level in Multiplayer mode to unlock the corresponding weapon, perk, equipment, or killstreak/deathstreak:
Reach Level 80 in Multiplayer mode to unlock Prestige mode and the Prestige Shop. Each time you Prestige, you will get one Prestige token. You can use the token in the Prestige Shop to unlock one of the following bonuses or save it for use later. There are a total of ten Prestige ranks. Once you reach the tenth Prestige, you will have the ability to reset all your stats and progress and start over again. You will also unlock exclusive titles and emblems when you reach certain Prestiges, which will never be reset.
1. Extra Custom Class
2. Double XP (2 hours)
3. Double Weapon XP (2 hours)
4. Regular Package (title and emblem)
5. Unlock Gear (unlock a weapon, equipment, or perk permanently, no matter how many times you Prestige; available after the 1st Prestige)
6. Hardened Package (title and emblem; reach 5th Prestige)
7. Veteran Package (title and emblem; reach 10th Prestige)
8. Reset All Stats (reach 10th Prestige)
Perks
The following is a list of all perks and their effect:
Tier 1
Recon
Recon: Explosive damage shows target on mini-map
Recon Pro: Bullet damage shows target on mini-map
Sleight Of Hand
Sleight Of Hand: Faster reloading
Sleight Of Hand Pro: Switch weapons quicker
Blind Eye
Blind Eye: Undetectable to air support and sentry guns
Blind Eye Pro: Faster lock-on for launchers, and increased bullet damage to air support and sentries
Scavenger: Get ammo from dead enemies
Scavenger Pro: Get more ammo from dead enemies
Tier 2
Quickdraw
Quickdraw: Quicker aiming (ADS)
Quickdraw Pro: Quicker recovery from using grenade/equipment
Blast Shield
Blast Shield: Increased explosive resistance
Blast Shield Pro: Resistance to flash and concussion grenades
Hardline
Hardline: Killstreaks require 1 fewer kill
Hardline Pro: Two assists count as kill towards killstreaks, and deathstreaks require 1 fewer death
Assassin
Assassin: Undetectable by UAV, portable radar, thermal, and heartbeat sensors
Assassin Pro: Immunity to CUAV and EMP, and no red crosshair or name appears when targeted
Overkill
Overkill: Carry two primary weapons; second primary weapon cannot have attachments
Overkill Pro: Second primary weapon can have two attachments
Tier 3
Marksman
Marksman: Identify enemy targets at long range
Marksman Pro: Hold breath longer while sniping
Stalker
Stalker: Increased movement speed while aiming down the sights (ADS)
Stalker Pro: Delay enemy claymore explosions
Steady Aim: Increased hip fire accuracy
Steady Aim Pro: Weapon is ready faster after sprinting
Dead Silence
Dead Silence: Quieter movement, and Recon does not work as well against you
Dead Silence Pro: No fall damage
Proficency
The following is a list of the proficiencies for weapons and their attribute:
1. Kick (reduced recoil)
2. Range (increased range)
3. Attachments (equip two attachments)
4. Focus (reduced flinch when shot)
5. Melee (faster melee)
6. Stability (reduced sway)
7. Impact (greater bullet penetration through walls)
8. Speed (faster movement with weapon equipped)
9. Damage (shells do more damage; shotgun only)
Killstreak bonuses
Get the indicated number of consecutive kills in Multiplayer mode to get the corresponding bonus. Note: The Specialist Strike Package allows you to choose three additional perks. The Support Strike Package does not reset your killstreak after dying.
Die the indicated number of times in Multiplayer mode to get the corresponding bonus:
Final Stand: 4 deaths (unlocked at Level 32; enter Last Stand mode after dying with your primary weapon)
Juiced: 4 deaths (move faster for 7.5 seconds after spawning)
Martyrdom: 4 deaths (unlocked at Level 51; drop a live grenade after dying)
Dead Man's Hand: 5 deaths (unlocked at Level 57; enter Last Stand mode after dying with C4 equipped)
Hollow Points: 5 deaths (unlocked at Level 71; bullets cause more damage for one kill)
Revenge: 5 deaths (see position of last enemy that killed you on mini-map)
Weapons, attachments, equipment, and camouflage
The following is a list of the primary weapons, secondary weapons, attachments, equipment, and camouflage in the game, along with the level they are unlocked at in Multiplayer mode:
Classic
Snow
Multicam
Digital Urban
Hex
Choco
Snake
Blue
Red
Autumn
Gold
marine ( for Wii Users )
Winter (for founder Users )
Intel locations
Search the indicated locations to find all 46 Intel laptops:
Easy "Birdie" achievement
The best place to get the "Birdie" achievement is on the "Carbon" map in Special Ops Survival mode when two helicopters spawn in Round 6. Before reaching Round 6, buy 10 claymores and a turret. In total, you should have at least $10,000 at the end of Round 5. Go to the air support crate inside the building, and secure the area with your turret and claymores before starting Round 6. Then, start Round 6, and use Predator missiles to destroy the helicopters ($2,500 per missile). Stay in cover where no enemies can see you. You will get the "Birdie" achievement after shooting down the second helicopter as long as you took no damage at all during the round.
Easy "Get Rich Or Die Trying" achievement
Instead of trying to save up $50,000 by playing solo, play a Special Ops Survival map with two players. Once both players have a total sum of $50,000, go to the shop, and have one player give the other enough money so they have $50,000 to get the "Get Rich Or Die Trying" achievement. Then, give the other player enough money so they have $50,000 and get the achievement as well.
Easy "Jack The Ripper" achievement
In the "Stronghold" mission, when Price tells you to turn your night-vision on and he turns off the lights, quickly run around knifing the enemies to get the "Jack The Ripper" achievement.
Easy "Strike" achievement
At the multiplayer main menu, select "Options", then disable the "Theater Recording" option to help reduce lag during online games.
Multiplayer unlockables
Is this proven? I have always left recording on since MW3 came out and I have never turned it off. If someone has tried playing with it off and it does reduce lag let me know
Reach Level 31 in Multiplayer mode for a weapon by getting 1,000 kills with it to unlock the Gold camo for the weapon.
Secret killstreak
Get a 25 (24 with Hardline) killstreak using only your gun/knife/equipment (killstreak kills do not count) to get a M.O.A.B. (Mother Of All Bombs). When activated, it will kill all enemies on the map, no matter where they are, as well as disable the enemy's equipment, electronics, and pointstreaks for one minute. Additionally, the team with the person who calls in a M.O.A.B. will get double XP for the rest of the match.
Easy XP
Once you reach Level 20 in Multiplayer mode, use the Specialist Killstreak package to get a lot of extra XP. Create a class with the Hardline perk and use the Specialist Killstreak package. You will get extra points at kills 1, 3, 5, and 7. It will also help you complete the perk's challenges and the Specialist challenges for each perk. You will be completing the perks, and each perk has a Specialist perk challenge to it. For example, if at one kill you unlock Assassin, you will be completing Assassin challenges while also completing the "Assassin" Specialist challenge. You will get a lot of XP as you complete these challenges in addition to the 200 XP you get for kills 1, 3, 5, and 7 each time. This works best in modes where you get a lot of kills. Additionally, you get extra points for kills 8, 9, 10, etc. as long as you have all the perks enabled and have not died.
Easy Blast Shield Pro
Throw a Flash or Concussion grenade at the wall so it bounces back at you and stuns you. It will be counted as deflecting an explosion for the Blast Shield Pro. Note: This glitch was done on an unpatched version of the game.
Easy SitRep Pro
Once you unlock the Trophy System tactical equipment, assign it to a class, and deploy it. Then, knife it, and it will count towards destroyed enemy equipment for the SitRep Pro. Note: This glitch was done on an unpatched version of the game.
Reducing lag
At the multiplayer main menu, select "Options", then disable the "Theater Recording" option to help reduce lag during online games.
Multiplayer unlockables
Reach the indicated level in Multiplayer mode to unlock the corresponding weapon, perk, equipment, or killstreak/deathstreak:
Reach Level 80 in Multiplayer mode to unlock Prestige mode and the Prestige Shop. Each time you Prestige, you will get one Prestige token. You can use the token in the Prestige Shop to unlock one of the following bonuses or save it for use later. There are a total of ten Prestige ranks. Once you reach the tenth Prestige, you will have the ability to reset all your stats and progress and start over again. You will also unlock exclusive titles and emblems when you reach certain Prestiges, which will never be reset.
1. Extra Custom Class
2. Double XP (2 hours)
3. Double Weapon XP (2 hours)
4. Regular Package (title and emblem)
5. Unlock Gear (unlock a weapon, equipment, or perk permanently, no matter how many times you Prestige; available after the 1st Prestige)
6. Hardened Package (title and emblem; reach 5th Prestige)
7. Veteran Package (title and emblem; reach 10th Prestige)
8. Reset All Stats (reach 10th Prestige)
Perks
The following is a list of all perks and their effect:
Tier 1
Recon
Recon: Explosive damage shows target on mini-map
Recon Pro: Bullet damage shows target on mini-map
Sleight Of Hand
Sleight Of Hand: Faster reloading
Sleight Of Hand Pro: Switch weapons quicker
Blind Eye
Blind Eye: Undetectable to air support and sentry guns
Blind Eye Pro: Faster lock-on for launchers, and increased bullet damage to air support and sentries
Scavenger: Get ammo from dead enemies
Scavenger Pro: Get more ammo from dead enemies
Tier 2
Quickdraw
Quickdraw: Quicker aiming (ADS)
Quickdraw Pro: Quicker recovery from using grenade/equipment
Blast Shield
Blast Shield: Increased explosive resistance
Blast Shield Pro: Resistance to flash and concussion grenades
Hardline
Hardline: Killstreaks require 1 fewer kill
Hardline Pro: Two assists count as kill towards killstreaks, and deathstreaks require 1 fewer death
Assassin
Assassin: Undetectable by UAV, portable radar, thermal, and heartbeat sensors
Assassin Pro: Immunity to CUAV and EMP, and no red crosshair or name appears when targeted
Overkill
Overkill: Carry two primary weapons; second primary weapon cannot have attachments
Overkill Pro: Second primary weapon can have two attachments
Tier 3
Marksman
Marksman: Identify enemy targets at long range
Marksman Pro: Hold breath longer while sniping
Stalker
Stalker: Increased movement speed while aiming down the sights (ADS)
Stalker Pro: Delay enemy claymore explosions
Steady Aim: Increased hip fire accuracy
Steady Aim Pro: Weapon is ready faster after sprinting
Dead Silence
Dead Silence: Quieter movement, and Recon does not work as well against you
Dead Silence Pro: No fall damage
Proficency
The following is a list of the proficiencies for weapons and their attribute:
1. Kick (reduced recoil)
2. Range (increased range)
3. Attachments (equip two attachments)
4. Focus (reduced flinch when shot)
5. Melee (faster melee)
6. Stability (reduced sway)
7. Impact (greater bullet penetration through walls)
8. Speed (faster movement with weapon equipped)
9. Damage (shells do more damage; shotgun only)
Killstreak bonuses
Get the indicated number of consecutive kills in Multiplayer mode to get the corresponding bonus. Note: The Specialist Strike Package allows you to choose three additional perks. The Support Strike Package does not reset your killstreak after dying.
Die the indicated number of times in Multiplayer mode to get the corresponding bonus:
Final Stand: 4 deaths (unlocked at Level 32; enter Last Stand mode after dying with your primary weapon)
Juiced: 4 deaths (move faster for 7.5 seconds after spawning)
Martyrdom: 4 deaths (unlocked at Level 51; drop a live grenade after dying)
Dead Man's Hand: 5 deaths (unlocked at Level 57; enter Last Stand mode after dying with C4 equipped)
Hollow Points: 5 deaths (unlocked at Level 71; bullets cause more damage for one kill)
Revenge: 5 deaths (see position of last enemy that killed you on mini-map)
Weapons, attachments, equipment, and camouflage
The following is a list of the primary weapons, secondary weapons, attachments, equipment, and camouflage in the game, along with the level they are unlocked at in Multiplayer mode:
Classic
Snow
Multicam
Digital Urban
Hex
Choco
Snake
Blue
Red
Autumn
Gold
marine ( for Wii Users )
Winter (for founder Users )
Intel locations
Search the indicated locations to find all 46 Intel laptops:
Easy "Birdie" achievement
The best place to get the "Birdie" achievement is on the "Carbon" map in Special Ops Survival mode when two helicopters spawn in Round 6. Before reaching Round 6, buy 10 claymores and a turret. In total, you should have at least $10,000 at the end of Round 5. Go to the air support crate inside the building, and secure the area with your turret and claymores before starting Round 6. Then, start Round 6, and use Predator missiles to destroy the helicopters ($2,500 per missile). Stay in cover where no enemies can see you. You will get the "Birdie" achievement after shooting down the second helicopter as long as you took no damage at all during the round.
Easy "Get Rich Or Die Trying" achievement
Instead of trying to save up $50,000 by playing solo, play a Special Ops Survival map with two players. Once both players have a total sum of $50,000, go to the shop, and have one player give the other enough money so they have $50,000 to get the "Get Rich Or Die Trying" achievement. Then, give the other player enough money so they have $50,000 and get the achievement as well.
Easy "Jack The Ripper" achievement
In the "Stronghold" mission, when Price tells you to turn your night-vision on and he turns off the lights, quickly run around knifing the enemies to get the "Jack The Ripper" achievement.
Easy "Strike" achievement
By : TiCiiX/CheatCC
What is the point in this thread? We already know pretty much everything in this thread plus their is already a thread for the intel.
This should be closed as most of us know all this man.