Perks

For the perks available in zombies, see Perk-a-Cola.

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), Call of Duty: Modern Warfare 3, Call of Duty: Black Ops II and Call of Duty: Ghosts. They passively affect gameplay, allowing further customization of classes. They affect available equipment, effectiveness of the player's equipment, the speed the player's equipment can be used, the usefulness of the enemy's equipment, and the physical properties of the player's character.

Call of Duty 4: Modern Warfare

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 once.

Call of Duty 4: Modern Warfare - Perks
Tier 1 Perks
Name	Unlock Lvl.	Effect	Icon
C4 x2	1	Gives you 2 remote-detonated explosives.
RPG-7 x2	1	Gives you a rocket launcher with two rockets.
Special Grenades x3	1	Gives player either 3 stun grenades or 3 flash grenades.
Bomb Squad	14	Enemy explosives are marked with icons.
Claymore x2	23	Gives you 2 Claymores.
Bandolier	32	Gives player extra starting ammo for your primary and secondary weapons
Frag x3	41	Gives player 3 fragmentation grenades
Tier 2 Perks
Name	Unlock Lvl.	Effect	Icon
Juggernaut	1	Reduces incoming damage by 25%, cancels out Stopping Power and Sonic Boom
Sleight of Hand	20	Halves reloading time.
Sonic Boom	1	Increases explosives damage by 25%, cancels out Juggernaut
Stopping Power	1	Increases bullet damage by 40%, cancels out Juggernaut
Double Tap	29	Increases rate of fire by 33%.
UAV Jammer	11	Player becomes invisible against enemy UAVs.
Overkill	38	Allows you to have an extra primary weapon instead of a pistol.
Tier 3 Perks
Name	Unlock Lvl.	Effect	Icon
Deep Impact	1	Extra bullet damage when shooting through walls.
Extreme Conditioning	1	Doubles players sprinting time.
Steady Aim	1	Increases hipfiring accuracy.
Last Stand	8	Player pulls out a pistol before dying. Headshots, grenade explosions, knife stabs, shotgun blasts, sniper rifle one-hit-kills, killstreaks and other directly lethal attacks will cancel this out.
Martyrdom	17	Drop a live grenade after death.
Iron Lungs	26	Longer breath hold for sniper rifles.
Eavesdrop	35	Hear near by enemy's voice chat.
Dead Silence	44	Foot steps are 75% more silent
Attachments
Name	Unlock Lvl.	Effect	Icon
Grenade Launcher	N/A	Equips assault rifles with a grenade launcher. Will take the place of first tier perk.
Grip	N/A	Equips shotguns and light machine guns with a vertical forward handgrip. Decreases recoil and improves accuracy. Will take the place of first tier perk.

Call of Duty: World at War

As with 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
Name	Unlock Lvl.	Effect	Icon
Special Grenades x3	1	Gives player 3 Special Grenades.
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 of any lethal grenades.
M2 Flamethrower	65	Equips the player with a Flamethrower.
Tier 2 Perks
Name	Unlock Lvl.	Effect	Icon
Stopping Power	1	Bullet damage increased by 40%. Cancels out Juggernaut.
Fireworks	1	Explosive damage increased by 40%. Cancels out Flak Jacket.
Flak Jacket	1	Reduces incoming explosive damage by 25%. Cancels out Fireworks.
Gas Mask	1	Makes player immune to Tabun Gas.
Juggernaut	1	Reduces incoming bullet damage by 25%. Cancels out Stopping Power.
Camouflage	12	Player becomes invisible against enemy Recon Planes.
Sleight of Hand	28	Reload 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
Name	Unlock Lvl.	Effect	Icon
Deep Impact	1	Reduces damage lost when shooting through walls.
Extreme Conditioning	1	Double sprint duration.
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	Expose all Artillery, Dogs and Tanks on the map.
Vehicle Perks
Name	Unlock Lvl.	Effect	Icon
Water Cooler	1	Decreased turret overheating.
Greased Bearings	1	Increased turret rotation speed.
Ordnance Training	12	Gives 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
Name	Unlock Lvl.	Effect	Icon
Rifle Grenade	-	Equips semi-automatic and bolt-action rifles with a grenade launcher. Will remove tier one if equipped.
Foregrip	-	Equips shotguns with a vertical forward handgrip. 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

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 and World at War 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; only one of each can be equipped.

Call of Duty: Modern Warfare 2 - Perks
Tier 1 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Icon	Pro Icon
Marathon	4	Unlimited sprint.	Mantle obstacles faster.
Sleight of Hand	4	Faster reloading.	Faster ADS (Aim Down Sight).
Scavenger	13	Resupply from dead bodies (both friendly and enemy).	Extra starting magazines (except for launchers)
Bling	21	Allows an extra attachment on your primary weapon.	Allows an extra attachment to secondary weapon.
One Man Army	45	Allows class switching in-game. (Replaces secondary weapon)	Faster class switching (from 5 seconds to 3).
Tier 2 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Icon	Pro Icon
Stopping Power	4	Increased bullet damage by 40%.	Increased bullet damage vs enemy killstreak rewards.
Lightweight	4	Move 7% faster.	Quicker aiming after sprinting.
Hardline	9	Killstreaks require 1 less kill.	Deathstreaks require 1 less death.
Cold Blooded	25	Invisible against enemy sentry guns, thermal optics, aerial killstreaks and UAVs.	No cross-hair, icon, and red name when being aimed at.
Danger Close	33	Increased explosive damage by 40%.	Increased damage when using explosive killstreak rewards.
Tier 3 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Icon	Pro Icon
Commando	1	Increased melee lunge distance.	No falling damage.
Steady Aim	1	Increased hip-fire accuracy.	Hold breath longer when scoped.
Scrambler	17	Jams the enemy radar when they are close enough.	Delays enemy claymore explosions.
Ninja	29	Imune to the Heartbeat Sensor.	footsteps are 4 times more silent. Cancels out SitRep Pro
SitRep	37	Detect enemy explosives.	Enemy footsteps are 4 times louder. you can not hear your own footsteps, although the enemies can.
Last Stand	41	Use a pistol while bleeding out prior to death. Headshots, grenade explosions, knife stabs, shotgun blasts, sniper rifle one-hit-kills, killstreaks and other directly lethal attacks will cancel this out.	Use your equipment in Last Stand. Same rules apply as the standard version of Last Stand.
Death Streaks
Perk Name	Unlock Lvl.	Number of Deaths Required to Activate	Effect		Icon
Copycat	4	4	Copy the loadout of the person who last killed you during the killcam.
Painkiller	6	3	Increased health for 10 seconds.
Martyrdom	27	4	Drop a live frag grenade upon death
Final Stand	39	4	Survive after lethal amount of damage, (while laying down) and use primary/secondary/equipment/special grenade.

Call of Duty: Black Ops

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.

Call of Duty: Black Ops - Perks
Tier 1 Perks
Name	Cost/Upgrade	Effect	Pro Effect	Icon	Pro Icon
Lightweight	Default/3000	Move 7% faster	No falling damage.
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).
Ghost	2000/3000	Invisible against Spy Planes.	Resistant against aircraft, infrared, and sentries. No cross-hair or red name when targeted.
Flak Jacket	2000/3000	Reduce explosive damage.	Take significantly less flame damage and reset the fuse of enemy frag grenades when thrown back.
Hardline	2000/3000	One less kill for killstreaks.	Allows player to randomly choose another reward from a Care Package once.
Tier 2 Perks
Name	Cost/Upgrade	Effect	Pro Effect	Icon	Pro Icon
Hardened	Default/3000	Increased bullet penetration.	Increased damage to enemy killstreaks and reduced flinch when shot at.
Scout	2000/3000	Hold breath longer when scoping.	Switch weapons faster.
Steady Aim	2000/3000	Increased hip-fire accuracy.	Faster recovery after sprinting and knifing.
Sleight Of Hand	2000/3000	Faster reload time.	Faster ADS. (Except sniper rifles.)
Warlord	2000/3000	Two primary weapon attachments (except underbarrel attachments).	Carry one extra lethal and tactical grenade, except Willy Pete.
Tier 3 Perks
Name	Cost/Upgrade	Effect	Pro Effect	Icon	Pro Icon
Marathon	2000/3000	Increased sprint duration.	Unlimited sprint.
Ninja	2000/3000	Quiet movement (75%)	Enemies will be heard louder. Player becomes completely silent.
Second Chance	2000/3000	Survive lethal damage and use a pistol while downed. Cannot be revived. Headshots, grenade explosions, knife stabs, shotgun blasts, sniper rifle one-hit-kills, killstreaks and other directly lethal attacks will cancel this out.	Increased bleed out time and teammates can revive you. Same rules apply as the standard version of Second Chance.
Hacker	2000/3000	Detect enemy equipment.	Receive and then booby trap enemy Care Packages, hack enemy equipment, and become invisible to Motion Sensors.
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.

Call of Duty: Black Ops (Nintendo DS) and Modern Warfare 3: Defiance

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

The perks are unlocked when the player reaches various multiplayer levels. The Perks are:

Perk	Effect
Bandolier	Doubles the ammo for all weapons except grenades
Body Armour	Decreases bodily damage
Camouflage	Semi-transparent when prone and stationary
Extra Pockets	2 extra grenades when spawning
Extreme Conditioning	Sprint time doubled
Fast Hands	Decrease time to arm and disarm bomb in Sabotage
Last Stand	Shoot a pistol when heavily wounded
Martyrdom	Drop a live grenade upon death
More Bang	Thrown grenades have a larger blast radius
Nerves of Steel	Reduced weapon recoil
Paper Walls	Full metal jackets granted for maximum penetration
Protections	5 seconds of invincibility upon spawning
Sleight of Hand	Reload time halved
Steady Aim	Increased hipfire accuracy
Stealth	Invisible on enemy radar
Stopping Power	Bullets inflict extra damage
Super Clip	Doubles magazine capacity for all weapons
Team Player	Appear as a friend on enemy radar

These perks return once again in Call of Duty: Modern Warfare 3: Defiance, but are now sorted into tiers. So unlike Black Ops DS where the player can pick any perk to equip in their perk slots. Players are now restricted into using perks in their allocated tier.

Call of Duty: Modern Warfare 3

Call of Duty: Modern Warfare 3 - Perks
Tier 1 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Pro Unlock	Icon	Pro Icon
Recon	Unlocked by default.	Explosive damage paints the target on the mini-map for 12 seconds. Effect is similar to an Advanced UAV, giving positional and directional intel on the victim. Can be partially cancelled out with Dead Silence.	Bullet damage highlights the target on the mini-map for 12 seconds. Effect is similar to an Advanced UAV, giving positional and directional intel on the victim. Can be partially cancelled out with Dead Silence.	Painting 120 enemies on the mini-map with Recon
Sleight of Hand	Unlocked by default.	Reload time halved.	Swap weapons twice as fast.	120 kills with Sleight of Hand
Blind Eye	11	Invincible against automated enemy air support and sentry guns. Player-controlled killstreaks can spot Blind Eye users through thermal vision.	Launchers lock-on twice as fast. 60% extra bullet damage versus air support and sentries.	Destroy 40 enemy killstreaks rewards using Blind Eye
Extreme Conditioning	22	Sprint for twice as long.	Mantle obstacles twice as fast.	Sprint 20 miles with Extreme Conditioning
Scavenger	39	Replenish non-explosive ammo from corpses. Weapon magazines, throwing knives and/ or underbarrel shotgun shells are given. Should a fallen body be armed with an underbarrel grenade launcher, walking over said body will surrender 1 round for that grenade launcher.	Extra mags upon spawning. Launchers do not benefit.	Replenish 100 ammo packs using Scavenger
Tier 2 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Pro Unlock	Icon	Pro Icon
Quickdraw	Unlocked by default.	ADS time reduced.	Recover from equipment and grenade usage three times as fast.	80 kills within a few seconds of aiming while in ADS and using Quickdraw
Blast Shield	Unlocked by default.	45% increased explosive resistance.	50% less stun time from flash and concussion grenades.	Survive 20 enemy explosions with Blast Shield
Hardline	15	Pointstreak acquisition requires 1 less point.	Every two assists earned add a point toward pointstreak acquisition. Deathstreaks require 1 less death.	Earn 80 pointstreak rewards using Hardline
Assassin	27	Invisible to enemy UAVs/ Advanced UAVs/ portable radars/ thermal scopes/ heartbeat sensors.	Resistant against Counter UAV/ EMP/ MOAB. No crosshair or red name when targeted. Undetectable by marksman users. Killstreaks activated by Assassin-employing players will be destroyed if an EMP/ MOAB is active.	20 kills with an enemy UAV/ Advanced UAV is active and with Assassin
Overkill	47	Secondary weapon replaced by a primary weapon incapable of accepting attachments.	Second primary weapon will accept 1 attachment and camouflage.	120 kills with second primary weapon
Tier 3 Perks
Name	Unlock Lvl.	Effect	Pro Effect	Pro Unlock	Icon	Pro Icon
Marksman	Unlocked by default.	Identify enemy targets at longer range. Assassin Pro renders this useless.	Hold breath twice as long with a sniper rifle scope/ VZS/ thermal scope.	50 kills while holding breath and using Marksman
Stalker	Unlocked by default.	Full speed movement when ADS.	2 second delay to enemy explosives	120 kills while ADS and moving when Stalker is equipped
SitRep	19	Detect enemy equipment,  (lethals and tacticals) as well as booby trapped packages.	Louder enemy footsteps, softer teammate footsteps. Cancels out Dead Silence.	Destroy 50 pieces of enemy equipment with SitRep equipped
Steady Aim	30	35% increased hip fire accuracy.	Weapon is ready faster after sprinting.	120 hip-fire kills using Steady Aim
Dead Silence	55	Quieter movement. Halves Recon duration. SitRep Pro renders this useless.	No fall damage. Hardcore modes and certain maps render this useless (eg the well in Seatown)	50 close range kills with Dead Silence
Death Streaks
Name	Unlock Lvl.	Number of Deaths Required to Activate	Effect			Icon
Juiced	Unlocked by default.	4 (3 with Hardline Pro)	Move much faster after spawning. Lasts 8 seconds.
Revenge	15	5 (4 with Hardline Pro)	Players see the position of the last enemy that killed them.
Final Stand	32	4 (3 with Hardline Pro)	Allows the player to crawl around and use their primary weapon when they are downed. Headshots, grenade explosions, knife stabs, shotgun blasts (especially with Damage), sniper rifle one-hit-kills, killstreaks and other directly lethal attacks will cancel this out.
Martyrdom	51	4 (3 with Hardline Pro)	Drop a live frag grenade upon death.
Dead Man's Hand	57	6 (5 with Hardline Pro)	Pull out C4 before death. Explosive has same strength as a deployed C4 detonation, but will not penetrate surfaces.
Hollow Points	71	5 (4 with Hardline Pro)	40% more bullet damage for 1 kill.

Call of Duty: Black Ops II

Perks

Call of Duty: Black Ops II - Perks
Name	Unlock Lvl.	Effect	Icon
Tier 1
Lightweight	4	Move 7% faster, take no fall damage
Flak Jacket	32	Take 65% less explosive damage. no explosive is one hit kill unless it is a direct impact.
Blind Eye	5	Undetectable by AI controlled air support.
Hardline	4	Player receives 16% more score towards their scorestreaks. This does not apply to UAV, CUAV, and EMP Assists.
Ghost	55	Invisible against enemy UAVs while moving, planting/defusing bombs, and controlling scorestreaks. Note: Using this will not grant immunity against Orbital VSATs.
Tier 2
Hard Wired	26	Immune to Counter-UAVs and EMPs
Scavenger	44	Replenish ammunition and lethals from enemies killed by the players (except explosive kills)
Cold Blooded	4	Immune to Dual Band, Target Finder, Millimeter Scanner, Sensor Grenades and Player controlled Scorestreaks. No red name when targeted by enemies.
Fast Hands	8	Swap guns faster, use lethal and tactical equipment faster. Reset the fuse when throwing back frag grenades.
Toughness	4	Flinch less when shot.
Tier 3
Dexterity	4	Climb ladders and mantle objects faster, aim faster after sprinting
Engineer	14	Show deployed enemy equipment, delay explosives, re-roll and booby trap enemy care packages
Dead Silence	38	Silent footsteps. Character does not talk nor does it make any other type of noise whatsoever.
Extreme Conditioning	4	Sprint for double the normal distance. Combat knife gains a 2.5x sprint distance.
Tactical Mask	20	Reduces the effects of flash, concussion and shock charges by 90%. (nearly immune)
Awareness	50	Enemy movements are louder. Users can not hear dead silence users.

Wildcards

Call of Duty: Black Ops II - Wildcards
Name	Unlock Lvl.	Effect	Icon
Primary Gunfighter	22	Allows a 3rd attachment for your primary weapon
Secondary Gunfighter	19	Allows a 2nd attachment for your secondary weapon Note: Dual Wield cannot be used with any other attachment for balance purposes.
Overkill	18	Carry a primary weapon in place of your secondary
Perk 1 Greed	4	Carry 1 extra perk from tier 1
Perk 2 Greed	10	Carry 1 extra perk from tier 2
Perk 3 Greed	13	Carry 1 extra perk from tier 3
Danger Close	28	Carry a second lethal
Tactician	25	Carry a tactical in place of your lethal

Call of Duty: Black Ops: Declassified

Call of Duty: Black Ops: Declassified - Perks
Name	Unlock Lvl.	Effect	Icon
Tier 1
Sleight of Hand		Reload faster
Lightweight		Run Faster
Hardline		Decreases amount of points for a Scorestreak
Jammer		Remain invisible to enemy UAV's, Sentries and Air Support.
Tier 2
Cold Blooded		No name on enemy screen.
Fast Hands		Swap weapons faster.
Hard-Wired		Immune to Counter UAV.
Toughness		Less flinch when shot
Tier 3
Dead Silence		No noise when moving
Flak Jacket		Protects from explosive damage
Surplus		Start off with extra mags and grenades
Marksman		See names from further away

Call of Duty: Ghosts

Perks return in Call of Duty: Ghosts, dividing into seven categories. These are Speed, Handling, Stealth, Awareness, Resistance, Equipment, and Elite. A player starts with 8 'points' to distribute between 35 perks. Perks are weighted between 1 and 5 points. Primary weapons, secondary weapons, and lethal and tactical equipment all count as one 'point', and removing them all would result in 12 'points' becoming available. Perks can be unlocked through a certain level or squad points. Any perk can be unlocked any time through squad points.

COD: Ghosts Perk Table

Speed	Ready Up (1)	Sleight of Hand (2)	Agility (2)	Marathon (2)	Stalker (3)
Handling	Strong Arm (1)	On The Go (1)	Reflex (2)	Steady Aim (2)	Quickdraw (3)
Stealth	Takedown (1)	Blind Eye (2)	Dead Silence (2)	Incog (3)	Off the Grid (3)
Awareness	Recon (1)	Scavenger (2)	SitRep (2)	Amplify (2)	Wiretap (3)
Resistance	Resilience (1)	ICU (2)	Focus (2)	Tac Resist (2)	Blast Shield (2)
Equipment	Extra Tactical (1)	Extra Lethal (2)	Fully Loaded (2)	Extra Attachment (3)	Danger Close (4)	Trigger Happy (Safeguard only)
Elite	Gambler (1)	Hardline (2)	Ping (2)	Overkill (3)	Deadeye (5)

Zombies

Name	Cost	Effect	Icon	Multiplayer Equivalent
Juggernog	2500	It increases the player's health from 100 to 250; meaning that the player can now survive 4 zombie hits (screen flashing red) or 5hellhound or gas zombie hits. George A. Romero and Brutus kill a player with Juggernog in 3 hits.		Juggernaut
Speed Cola	3000	Halves the reload speed of all guns. Also allows players to rebuild barriers three times as fast. The second effect is absent in Black Ops II zombies.		Sleight of Hand
Quick Revive	500 (SP) or 1500 (MP)	In co-op, halves the revive time on allies. In solo, allows for a few seconds of Last Stand mode with Mustang and Sally pistols (unless the player has Ray Gun , Wave Gun , Ballistic Knife , Winter's Howl , CZ75 , Python or M1911 ), followed by self revive. In solo, this perk can only be bought three times and does not require the power to be turned on. For balance purposes, the dispenser offering this will disappear after the perk is purchased said number of times.		Second Chance Pro
Double Tap Root Beer	2000	Increases rate of fire for all guns by 33%. In Black Ops II, it is officially called "Double Tap II" and shots fired will give out double the amount. For example, firing 1 bullet will use 1 ammo but 2 slugs will emerge; shotguns will fire twice the pellets.		Double Tap / Rapid Fire
Stamin-Up	2000	Doubles sprint duration, allows the player to have highest mobility regardless of the guns used		Lightweight / Marathon
PhD Flopper	2000	Upon diving to prone off of a heightened surface, the player will create an explosion strong enough to kill all zombies within radius until about round 20. Also removes fall damage and self-induced explosive damage. This means that the player is vulnerable only to zombies.		Flak Jacket / Lightweight Pro
Deadshot Daiquiri	1500 (console) or 1000 (PC)	Gives the player increased hipfire accuracy. Provides an "aimbot" that automatically lines the player's sights on to a zombie head when aiming down sights (only on consoles). Less weapon recoil and eliminates the idle sway of sniper rifles.		Steady Aim / Scout
Mule Kick	4000	Gives the player the ability to hold three weapons by allowing the player to buy or pick up another without replacing either of the two already owned. The extra weapon will be lost if the player loses the perk.		Overkill
Tombstone Soda	2000	When the player dies, their perks and weapons are saved into a 'tombstone' pickup, only able to be picked up by the player. It also grants the ability of suicide from Last Stand.
Who's Who	2000	When a player is downed, they take control of a doppelganger that can be used to revive themselves or any other downed player. If the player revives themselves, they keep all perks (except Who's Who) and all equipment. If the doppelganger also goes down, then both persons must be revived, or just the original.		Final Stand
Electric Cherry	2000	When the player reloads, an electric field is generated around the player. Radius and damage is affected by the number of bullets left in the magazine, in comparison to the magazine size.
Vulture Aid	3000	Zombies killed by players using this perk will drop little yellow bags that contain either points or ammo. All purchasable items are highlighted in the map and can be seen through walls. Dead zombies may also drop a green gas, which can be used by the player to get ignored by the zombies for a limited amount of time.		Scavenger / Engineer

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.
• If a player unlocks the Pro version of a Perk in Call of Duty: Modern Warfare 2 and Call of Duty: Modern Warfare 3, 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, 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 (Nintendo DS) is the first Nintendo DS Call of Duty game to feature 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.
• Ghosts has the most amount of perks at 35. The previous holder had been World at War at 33.
• Dead Man's Hand was originally going to appear in Call of Duty: Modern Warfare 2, but was cut for unknown reasons.
• Originally, Copycat had a black cat as its picture, as seen in the official strategy guide, but was changed to the mask later in game development.
• In Call of duty: Black Ops 2, the second tier of perks is the only tier to not feature a soldier holding a weapon of sort. Tier 1 would also be, if it weren't for Ghost.
• Call of Duty: Black Ops II is the first Call of Duty game since Call of Duty: World at War to feature no Pro Perks.
• Call of Duty: Black Ops II is the first game to include Wildcards that allow the player to have more than three perks in total and more than one perk in a tier.
• In Call of Duty: Black Ops and Call of Duty: Black Ops II, perks in each tier have a specific shape. Tier 1 is in the shape of a shield, Tier 2 is an up-side-down pentagon with Tier 3 being an arrowhead.
• Both Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2 have perk icons that are curved in the sides, while in Call of Duty: Modern Warfare 3 the perk icons appear just as squares.