Perks

Perks are modifiers featured in the multiplayer aspects of Call of Duty 4: Modern Warfare, Call of Duty: World at War, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, Call of Duty: Black Ops (Nintendo DS) and Call of Duty: Modern Warfare 3 that passively affect game play, allowing further customization of classes. They affect available equipment, effectiveness of the player's equipment, the usefulness of the enemy's equipment, and the physical properties of the player's character.

Call of Duty 4: Modern Warfare Perks

Some perks are available initially while others are unlocked as the player progresses through multiplayer ranks. Up to three perks, one of each tier, can be equipped at one time. The tiers are color coded blue, red, and green and therefore only one of each color perk can be equipped at a time.

Call of Duty 4: Modern Warfare - Perks
Tier 1 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
C4 x2	1	Equips player with two packs of remote-detonated explosives.	File:C4 x2.png
RPG-7 x2	1	Equips player with a rocket launcher with two rounds.
Special Grenades x3	1	Gives player either 3 stun grenades or 3 flash grenades. No smoke.
Bomb Squad	14	Enemy explosives are marked with icons.
Claymore x2	23	Equips player with two proximity mines.
Bandolier	32	Gives player extra reserve ammo.
Frag x3	41	Gives player 3 fragmentation grenades
Tier 2 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Juggernaut	1	Reduces incoming damage by 25%; cancels out Stopping Power.
Sleight of Hand	20	Increases reloading speed.
Sonic Boom	1	Increases explosives damage by 25%.
Stopping Power	1	Increases bullet damage by 40%.
Double Tap	29	Increases rate of fire by 33%.
UAV Jammer	11	Player becomes undetectable by enemy UAVs.
Overkill	38	Replaces secondary weapon with another primary weapon.
Tier 3 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Deep Impact	1	Extra damage through walls.
Extreme Conditioning	1	Doubles sprint time.
Steady Aim	1	Increases hipfiring accuracy.
Last Stand	8	Player pulls out a pistol before dying.
Martyrdom	17	Drop a live grenade after death.
Iron Lungs	26	Longer breath hold for sniper rifles.
Eavesdrop	35	Hear the enemy voice chat.
Dead Silence	44	Reduces sound from footsteps.
Attachments
Item Name	Unlock Lvl.	Effect	Item Icon
Grenade Launcher	--	Equips weapon with a grenade launcher. (Assault rifles only.) Will take the place of first tier perk.
Grip	--	Equips weapon with a front grip. Decreases recoil and improves accuracy. (Shotguns and light machine guns only.) Will take the place of first tier perk.

Call of Duty: World at War Perks

Like in Call of Duty 4: Modern Warfare, the perks are divided into equipment, weapon and ability tiers.

Call of Duty: World at War - Perks
Tier 1 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Special Grenades x3	1	Gives player 3 Special Grenades. Smoke Grenades are not included.
Satchel Charge x2	1	Gives player 2 Satchel Charges
M9A1 Bazooka x2	1	Gives player a Bazooka with two rockets.
Bomb Squad	16	Enemy Satchel Charges and Bouncing Betties are exposed.
Bouncing Betty x2	24	Equips player with two proximity mines similar to Claymores.
Bandolier	40	Increases initial starting ammunition
Primary Grenades x2	44	Gives the player two (x2) of any lethal grenades.
M2 Flamethrower	65	Equips the player with a Flamethrower.
Tier 2 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Stopping Power	1	Bullet damage increased by 40%. Canceled out by Juggernaut.
Fireworks	1	Explosive damage increased by 40%
Flak Jacket	1	Reduces incoming explosive damage by 25% . Cancels out the perk Fireworks.
Gas Mask	1	No effect from Tabun Gas.
Juggernaut	1	Reduces incoming bullet damage by 25%. Cancels out Stopping Power.
Camouflage	12	Player becomes undetectable by enemy Recon Planes.
Sleight of Hand	28	Reloading time is halved.
Shades	32	Reduces the glare effects of Signal Flares.
Double Tap	36	Increases rate of fire by 33%
Overkill	56	Replaces secondary weapon with another primary weapon.
Tier 3 Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Deep Impact	1	Reduces damage lost when shooting through cover.
Extreme Conditioning	1	Extra sprint time.
Steady Aim	1	Increased hipfire accuracy.
Toss Back	6	Resets the fuse of thrown-back grenades.
Second Chance	9	When near death, the player will pull out a pistol. Also gives the player the ability to revive downed allies. Downed after sustaining lethal fire for 30 sec.
Martyrdom	20	A live grenade is dropped upon death.
Fireproof	48	Damage from fire done to the player is reduced to 55%.
Dead Silence	52	Reduces movement noise significantly.
Iron Lungs	60	Sniper Scope hold-breath time is increased to 10 seconds.
Reconnaissance	64	Ability to see all Artillery, Dogs and Tanks on the map.
Vehicle Perks
Perk Name	Unlock Lvl.	Effect	Skill Icon
Water Cooler	1	Decreased turret overheating.
Greased Bearings	1	Increased turret rotation speed.
Ordnance Training	12	Will give an effect similar to Sleight of Hand, halving the player's reload time.
Leadfoot	28	Increases tank speed.
Coaxial Machine Gun	40	Allows driver to use a Coaxial machine gun in the front of the tank.
Weapon Attachments
Item Name	Unlock Lvl.	Effect	Item Icon
Rifle Grenade	--	Equips weapon with an impact grenade launcher. (Semi-automatic or bolt-action rifles.) Will remove tier one if equipped.
Foregrip	--	Equips weapon with a front grip. (Shotguns only.) Will remove tier one if equipped.

Vehicle perks, Shades, Iron Lungs and Reconnaissance are not available on the Wii version of Call of Duty: World at War.

Call of Duty: Modern Warfare 2 Perks

In Call of Duty: Modern Warfare 2 the perks are divided into tiers in different ways than in Call of Duty 4 and World at War. Along with standard perks, players will now be able to unlock improved "Pro" versions of certain perks by fulfilling certain requirements while using them. These "Pro" versions include the original abilities of the perk, but also add new benefits. Many of the perks that were in Call of Duty 4 or 5 that are missing are now either part of a Pro perk, available as weapon attachments, or are now deathstreaks, such as Deep Impact (FMJ), Bandolier (Scavenger Pro), and Martyrdom. The Overkill perk has been replaced partially by the inclusion of Machine Pistols, Shotguns, and Launchers as secondary weapons and also by the One Man Army and Bling perks. Interestingly, if a Perk Challenge IV is achieved mid-game the "Pro" version will take effect immediately for all classes equipped with that perk. However, the effect of the Pro version is granted after respawning. Up to three perks, one of each tier, can be equipped at one time. The tiers are color coded blue, red, and green and therefore only one of each can be equipped.

Call of Duty: Modern Warfare 2 - Perks
Tier 1 Perks
Perk Name	Unlock Lvl.	Effect	Pro Effect	Skill Icon	Pro Icon
Marathon	1	Unlimited sprint.	Climb ladders and objects faster. Unlock Pro: Run 26 miles using marathon. Unlock Emblem: Run 104 miles using marathon
Sleight of Hand	1	Faster reloading.	Faster ADS. Unlock Pro: Get 120 kills using Sleight of Hand. Unlock Emblem: Get 750 kills using Sleight of Hand.
Scavenger	13	Resupply from dead bodies.	Extra mags when spawned. Unlock Pro: Resupply from 100 dead bodies. Unlock Emblem: Resupply from 500 dead bodies.
Bling	21	Allows two attachments to primary weapon.	Allows two attachments to secondary weapon. Unlock Pro: Get 250 kills using two weapon attachments. Unlock Emblem: Get 900 kills using two weapon attachments.		64px
One Man Army	45	Allows class switching in-game. (Replaces secondary weapon)	Faster class switching (from 5 seconds to 3). Unlock Pro: Get 100 kills using One Man Army. Unlock Emblem: Get 750 kills using One Man Army.
Tier 2 Perks
Perk Name	Unlock Lvl	Effect	Pro Effect	Skill Icon	Pro Icon
Stopping Power	1	Increased bullet damage by 40%.	Increased damage to vehicles and aircraft. Unlock Pro: Get 250 kills using Stopping Power. Unlock Emblem: Get 1000 kills using Stopping Power.
Lightweight	1	Move 7% faster.	Quicker aiming after sprinting. Unlock Pro: Sprint 30 miles using Lightweight. Unlock Emblem: Sprint 250 miles using Lightweight.	64px	64px
Hardline	9	Killstreaks require 1 less kill.	Deathstreaks require 1 less death. Unlock Pro: Get 40 killstreaks while using Hardline. Unlock Emblem: Get 150 killstreaks while using Hardline.
Cold Blooded	25	Invisible to enemy thermal optics, and enemy killstreaks.	No red cross-hair or name when targeted. Unlock Pro: Destroy 40 killstreak rewards using Cold Blooded. Unlock Emblem: Destroy 250 killstreak rewards using Cold-Blooded.
Danger Close	33	Increased explosive damage.	Increased damage from killstreak rewards. Unlock Pro: 100 kills using explosives while using Danger Close. Unlock Emblem: 300 kills using explosives while using Danger Close.
Tier 3 Perks
Perk Name	Unlock Lvl	Effect	Pro Effect	Skill Icon	Pro Icon
Commando	1	Increased melee lunge distance.	No falling damage. Unlock Pro: 20 melee kills using Commando. Unlock Emblem: 100 melee kills using Commando.
Steady Aim	1	Increased hip-fire accuracy.	Hold breath longer when scoped. Unlock Pro: 80 hip fire kills using Steady Aim. Unlock Emblem: 500 hip-fire kills using Steady Aim.
Scrambler	17	Jams the enemy radar when they are close enough.	Delays enemy claymore explosions. Unlock Pro: 50 close range kills using Scrambler. Unlock Emblem: 250 close range kills using Scrambler.
Ninja	29	Makes Player invisible to the Heartbeat Sensor.	Silent footsteps. Unlock Pro: 50 close range kills using Ninja. Unlock Emblem: 250 close range kills using Ninja.
SitRep	37	Detect enemy explosives.	Enemy footsteps are louder. Unlock Pro: Destroy 120 enemy pieces of equipment using SitRep. Unlock Emblem: Destroy 750 enemy pieces of equipment using SitRep.	64px
Last Stand	41	Use a pistol while bleeding out prior to death.	Use your equipment in Last Stand. Unlock Pro: 20 kills while in Last Stand. Unlock Emblem: 100 kills while in Last Stand.
Death Streaks
Perk Name	Unlock Lvl	Number of Deaths Required to Activate	Effect		Skill Icon
Copycat	4	4	Copy the loadout of the person who last killed you during the killcam.		64px
Painkiller	6	3	Increased health for 10 seconds.		64px
Martyrdom	27	4	Drop a live frag grenade upon death		64px
Final Stand	39	4	Survive after lethal amount of damage, and use primary/secondary/equipment/special grenade.		64px

Call of Duty: Black Ops Perks

All Perks are unlocked for purchase at level 4. Unlocking Pro Perks requires three sets of challenges (related to the standard version) to be completed, as well as the purchase of the ability for 2000 CoD Points and the 3000 cost for the upgrade to its pro version. The appearance of the pro perks are done in a similar fashion to the ones in Modern Warfare 2, where the background becomes a star with the perk graphic superimposed over top of it.

First tier perks designate player appearance and provide constant passive effects. Second tier perks enhance weapon performance. Third tier perks can be either active or passive and are generally more context-sensitive than first tier perks. The perks featured in Black Ops are as follows. On Black Ops, the pro challenges relate to the effect of the pro. For example, Marathon, the challenge is "Sprint 26 miles using Marathon" and the pro is unlimited sprint.

Call of Duty: Black Ops - Perks
Tier 1 Perks
Perk Name	Cost/Upgrade	Effect	Pro Effect	Skill Icon	Pro Challenges
Lightweight	Default/3000	Faster movement.	No falling damage.	64px	Escape death 5 times after being wounded. Get 15 melee kills. Get 10 offense medals by killing enemies near their objectives.
Scavenger	2000/3000	Pick up ammo and lethal grenades from dead bodies.	Extra mags when spawned and replenish tactical grenades (except Willy Pete smoke grenade).	64px	Resupply 150 times while using Scavenger. Get 5 Lethal Grenade kills with a resupplied grenade. Get 5 kills without dying, 5 times.
Ghost	2000/3000	Undetectable by Spy Planes.	Undetectable by aircraft, infrared, and sentries. No red cross-hair or name when targeted.	64px	Destroy 1 Enemy Sentry Gun. Shoot down 30 enemy killstreaks with any non-killstreak weapon. Kill 20 enemies while their Spy plane is active.
Flak Jacket	2000/3000	Reduce explosive damage.	Take significantly less fire damage and reset the fuse of enemy throwback grenades (frags).	64px	Survive 10 explosions Throw back 5 enemy grenades. Plant or disarm 10 bombs in Demolition, Search and Destroy, or Sabotage.
Hardline	2000/3000	One less kill for killstreaks.	Allows player to randomly choose another reward from a Care Package once.	64px	Share 10 Care Packages with your Allies. Earn 7 killstreaks in one match using Hardline. Get 7 kills without dying in one match.
Tier 2 Perks
Perk Name	Cost/Upgrade	Effect	Pro Effect	Skill Icon	Challenges
Hardened	Default/3000	Increased bullet penetration.	Increased damage to enemy killstreaks and reduced flinch when shot at.		Get 10 penetration kills. Shoot 200 bullets into enemy aircraft (Spy planes, Helicopters etc.). Destroy a piece of equipment through a wall or object.
Scout	2000/3000	Hold breath longer when scoping.	Switch weapons faster.		Kill 50 enemies with your secondary weapon. Get 30 Headshots Get 50 'One Shot, one Kill' medals.
Steady Aim	2000/3000	Increased hip-fire accuracy.	Faster ADS after sprinting and faster recover after knifing.	64px	Melee two enemies consecutively within 5 seconds. Kill 100 enemies after sprinting. Kill 150 enemies while hip firing.
Sleight Of Hand	2000/3000	Faster reload time.	Faster ADS. (Except sniper rifles.)	64px	Get 150 Kills while aiming down sights. Kill an enemy within 5 seconds of reloading 30 times. Reload and finish off the enemy you wounded 10 times.
Warlord	2000/3000	Two primary weapon attachments (except underbarrel attachments).	Carry one extra lethal and tactical grenade, except Willy Pete.	64px	Get 150 kills using a gun with two attachments. Get 10 Frag or Semtex Kills Get 1 Multi-kill with Frag or Semtex
Tier 3 Perks
Perk Name	Cost/Upgrade	Effect	Pro Effect	Skill Icon	Challenges
Marathon	2000/3000	Increased sprint duration.	Unlimited sprint.	64px	Sprint 26 Miles using Marathon. Get the First Blood Medal 10 times. In Capture the Flag, get the Flag Capture medal 15 times while using Marathon.
Ninja	2000/3000	Quiet movement (75%)	Enemies will be heard louder. Player becomes completely silent.	64px	Get 150 kills with the suppressor attachment. Earning 5 Backstabber Medals Planting the bomb 10 times in Search and Destroy, Demolition, or Sabotage.
Second Chance	2000/3000	Survive lethal damage and use a pistol while downed. Cannot be revived.	Increased bleed out time and teammates can revive you.	64px	Get 10 kills while in Second Chance. Revenge — While in Second Chance, kill the enemy who downed you 5 times. Headshot — Get 1 headshot kill while in Second chance.
Hacker	2000/3000	Detect enemy equipment.	Receive and then sabotage enemy Care Packages and booby trap them, turn enemy equipment friendly and become invisible to Motion Sensors.		Destroy 10 pieces of enemy equipment. Get 25 kills with claymore or C4. Kill 25 enemies within the range of your Motion Sensor/jammer.
Tactical Mask	Default/3000	Immune to Nova Gas.	Reduces the effects of enemy flashbangs and concussion grenades. Reveals position of a flashed or stunned enemy.	64px	Kill 20 enemies while they are affected by each of your: concussion grenades, flash grenades and Nova Gas.

Call of Duty: Black Ops (Nintendo DS) Perks

Perks are featured in Call of Duty: Black Ops (Nintendo DS) can be selected during respawn and at the menu.

The perks are unlocked at various levels. The Perks are:

Bandolier: Doubles the ammo for all weapons except grenades.

Body Armor: Decrease bodily damage (does not include headshots or explosions). Different from Flak Jacket from console game, more like Juggernaut from Call of Duty 4: Modern Warfare.

Camouflage: The player is semi-transparent when crouching or not moving.

Extra Pockets: Spawn with 2 extra grenades.

Extreme Conditioning: Run for a longer time.

Fast Hands: Decrease time to arm and disarm bomb.

Last Stand: Player will go into Last Stand before dying.The player will be able to shoot with a pistol for a short period.

Martyrdom: Drop a live grenade after death. Returns from previous titles.

More Bang: Thrown grenades have a larger blast radius.

Nerves of Steel: Decrease weapon recoil.

Paper Walls: The player can shoot through walls. Similar to Hardened.

Protections: The player will have 5 seconds of invincibility after spawning.

Sleight Of Hand: Decrease reload time. Not useful as reload speeds are very fast.

Steady Aim: Increase accuracy of weapons.

Stealth: Never show on enemy radar.

Stopping Power: The players bullets do more damage.

Super Clip: Doubles the magazine size for all weapons.

Team Player: Appear as a friendly on enemy radar.

Perk-a-Colas

Main article: Perk-a-Cola

Perk Name	Cost	Effect	Icon	Multiplayer Equivalent
Juggernog	2500	Increases player health, downing in 5 hits from a zombie instead of normal 2. (5 from a Hellhound instead of normal 3).		Juggernaut
Speed Cola	3000	Doubles reload speed of all guns. Also allows players to rebuild barriers faster.	100px	Sleight of Hand
Quick Revive	500 (SP) or 1500 (MP)	Almost quarters revive time, or, in solo, allows for a few seconds of Last Stand mode with Mustang and Sally pistols if the player does not have a Ray Gun or Winter's Howl, followed by self revive. In solo, this perk can only be bought three times, and does not require the power to be turned on.		Second Chance Pro
Double Tap Root Beer	2000	Increases fire speed for all guns by 33%.		Double Tap / Rapid Fire
Stamin-Up	2000	Increases movement speed and sprint duration. (Does not give unlimited sprint however).		Lightweight / Marathon
PhD Flopper	2000	Upon diving to prone off of a heightened surface, the player will create a small "nuke", killing all zombies within radius until about round 20. Also removes fall damage and self-induced explosive damage. This means that the player is only vulnerable to zombies and are no longer a danger to themselves.		Flak Jacket
Deadshot Daiquiri	1500 (console) or 1000 (PC)	Gives the player increased hip fire accuracy. Automatically locks on to a zombies head when ADS. Less weapon recoil and the player doesn't have to hold his breath while using a sniper rifle. On PC version, only gives player increased hip fire accuracy.		Steady Aim / Scout
Mule Kick	4000	Gives the player the ability to hold three weapons rather than two.	100px	Overkill

Call of Duty: Modern Warfare 3

Call of Duty: Modern Warfare 3 - Perks
Tier 1 Perks
Perk Name	Unlock Lvl.	Effect	Pro Effect	Skill Icon	Pro Icon
Recon		Explosive damage paints the target on the mini-map.	Bullet damage paints the target on the mini-map.
Sleight of Hand		Faster reloading.	Swap weapons quicker.
Blind Eye		Undetectable by air support and sentries.	Launchers lock-on faster. Extra bullet damage versus air support and sentries.
Extreme Conditioning		Sprint for longer periods of time.	Climb obstacles faster.
Scavenger	39	Resupply from dead enemies.	Spawn with more ammo.
Tier 2 Perks
Perk Name	Unlock Lvl	Effect	Pro Effect	Skill Icon	Pro Icon
Quickdraw		Faster ADS.	Recover from equipment and grenade usage quicker.	64px
Blast Shield		Increased explosive resistance.	Resistance to flash and concussion grenades.
Hardline		Killstreaks require 1 less kill.	Every two assists earned count as a kill toward killstreaks. Deathstreaks require 1 less death.	64px
Assassin		Undectectable by UAV, portable radar, thermal and heartbeat sensors.	Immune to CUAV and EMP. No red crosshair or name when targeted.
Overkill	47	Second gun is replaced by a primary weapon.	Two attachments for second weapon.
Tier 3 Perks
Perk Name	Unlock Lvl	Effect	Pro Effect	Skill Icon	Pro Icon
Marksman		Identify enemy targets at long range.	Hold breath longer.	64px
Stalker		Move faster while aiming.	Delay enemy claymore explosions.	64px
SitRep		Detect enemy explosives and tactical insertions.	Louder enemy footsteps.
Steady Aim		Increased hip fire accuracy.	Weapon is ready faster after sprinting.
Dead Silence	55	Silent footsteps.	Move quietly. Reduce the effects of Recon.	65px
Death Streaks
Perk Name	Unlock Lvl	Number of Deaths Required to Activate	Effect		Skill Icon
Juiced		4	Move much faster after spawning. Lasts 7.5 seconds.
Revenge		5	Players see the position of the last enemy that killed them.
Final Stand	32	4	Survive after lethal amount of damage, and use primary/secondary/equipment/special grenade.
Martyrdom	51	4	Drop a live frag grenade upon death.
Dead Man's Hand	57	6	Player drops a bomb when he/she dies.
Hollow Points	71	5	Gives player extra bullet damage, but ends after 1 kill.

Trivia

In Call of Duty 4, the Tier 1 perks originally appeared after Tier 3 perks.
In Call of Duty 4 and Call of Duty: World at War, it is possible to empty the player's Tier 1 perk slot by attaching a grenade launcher or a grip to a weapon and then removing it.
Tier 1 perks in Call of Duty: Black Ops affect the user's player appearance.
There were rumors on the internet of a "monkey man" perk on Call of Duty: World at War, allowing the ability to climb trees, although there has never been any evidence of the perk. This rumor likely started because someone climbing a tree in this video can be seen: [1]
- The monkey man perk was even more convincing after a glitch on Makin was found, allowing the player to jump on top of a tree.
If a player unlocks the Pro version of a Perk in Call of Duty: Modern Warfare 2, the Perk will change automatically during the game and so the player will not have to change the perk in the Create-A-Class menu. In Black Ops however, the player has to buy it.
Pro perks all have stars as the background of the perks icon, superimposing the graphic on top of it.
If watching someone in the Killcam in Call of Duty: Modern Warfare 2, the text by each perk will not say that the perk is Pro unless the killed player has the Pro version of each respective perk. However, the pictures have the star background showing that the perk is pro.
Call of Duty: Black Ops for the Nintendo DS is the first Nintendo DS Call of Duty game to feature perks.
A glitch was found for getting Cold-Blooded Pro, in which if a helicopter is shot down by bullets causing it to spin down, every bullet that is shot into the falling helicopter will count as a killstreak destroyed. In order for this to work, the player must have Cold-Blooded while shooting the falling helicopter. This is demonstrated in this video: [2]
Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, and Modern Warfare 3 are the only Call of Duty games to feature Pro versions of perks.
In World at War, Tier 1 perks were originally green-colored. The green color for early World at War perks is brighter than color of Call of Duty 4 Tier 3 perks. Also, the bright green color was used for cut squad perks such as All Seeing Eye and Commanding Squad Leader.

FANDOM