These are the perks you can use in the Black Ops multiplayer mode. As with previous titles, there are 3 different slots (blue, orange and green). All perks are unlocked at level 4 and they can then be purchased with COD Points (cP). The first perk slot will determine the appearance of character, so if you equip the Ghost perk then your character will wear a ghillie suit.

To unlock the PRO+ version of a chosen perk, you will need to complete 3 different challenges specific to that perk. To view those challenges, click on the "Challenges ↓" link.

Perk Slot 1
2000 Lightweight
	Move faster. PRO: +Take no fall damage. Challenges ↓ Melee Kills — Earn 15 melee kills. Escape Death — Escape death 5 times after being hurt. Offense Medals — Get 10 Offense Medals by killing enemies near their objective.
2000 Scavenger
	Replenish ammo and Lethal Grenades from fallen enemies. PRO: +Start with extra mags and replenish Tactical Grenades from fallen enemies. Challenges ↓ Resupplies — Resupply 150 times while using Scavenger. Grenade Kills — Get 5 Lethal Grenade kills with a resupplied grenade. Kill Count — Get 5 kills without dying 5 times.
2000 Ghost
	Remain hidden from enemy Spy Planes. PRO: +Avoid targeting from aircraft, IR scopes, and Sentry Guns. No red crosshair or name when targeted. Challenges ↓ Concealed Kills — Kill 20 enemies while they have a Spy Plane or Blackbird active. Destroy Aircraft — Destroy 30 aircraft with any non-Killstreak launcher. Destroy Sentry Gun — Destroy 1 Sentry Gun.
2000 Flak Jacket
	Take less explosive damage. PRO: +Deflect fire damage and safely toss back Frag Grenades. Challenges ↓ Protected — Survive 10 explosions while using Flack Jacket. Demolished — Plant or defuse 10 bombs in Demolition, Sabotage, or Search & Destroy. Throwbacks — Throw back 5 enemy Frag Grenades.
2000 Hardline
	Earn killstreak rewards with one less kill. PRO: +Change the contents of a Care Package. Challenges ↓ Share Packages — Share 10 Killstreak reward crates with teammates. Multiple Killstreaks — Earn 7 Killstreaks in one match while using Hardline. Killstreak — Get 7 kills without dying in one match.
Perk Slot 2
2000 Hardened
	Penetrate walls and objects with deeper bullet impact. PRO: +Inflict extra bullet damage on aircraft and turrets, and flinch less when shot. Challenges ↓ Penetration Kills — Get 10 kills using Hardened and shooting through walls. Bullets in Aircraft — Shoot 200 bullets into enemy aircraft. Equipment Shot — Destroy 1 piece of enemy equipment through a wall.
2000 Scout
	Hold breath longer when scoped. PRO: +Switch weapons faster. Challenges ↓ Secondary Kills — Get 50 kills with secondary weapons. One Shot Kills — Get 50 One Shot, One Kill medals. Headshots — Get 50 headshot kills.
2000 Steady Aim
	Maintain increased accuracy when firing from the hip. PRO: +Aim faster after sprinting and recover quickly from knife lunges. Challenges ↓ Quick Melee — Melee two enemies consecutively within 5 seconds. Sprint Kils — Get 100 kills after sprinting. Hip Fire Kills — Get 150 hip fire kills using Steady Aim.
2000 Sleight of Hand
	Reload weapons faster. PRO: +Aim down sights faster with weapons (except Sniper Rifles). Challenges ↓ Aiming Kills — Get 150 kills while aiming down sights. Reload Kills — Kill an enemy within 5 seconds of reloading 30 times. Fast Hand Kills — Reload and finish off the enemy you wounded 10 times.
2000 Warlord
	Equip two attachments to your primary weapon (excluding underbarrels). PRO: +Start with one extra Lethal and Tactical Grenade (except Willy Pete). Challenges ↓ Two Attachment Kills — Get 150 kills using a gun with two attachments. Grenade Kills — Get 10 Frag or Semtex Kills. Grenade Multi-kills — Get 1 multi-kill with Frag or Semtex.
Perk Slot 3
2000 Tactical Mask
	Protect yourself against Nova gas. PRO: +Reduce the effects of Flash and Concussion Grenades, and reveal the position of a flashed or stunned enemy. Challenges ↓ Flash Kills — Kill 20 enemies that are blinded by your Flashbang. Concussion Kills — Kill 20 enemies that are stunned by your Concussion Grenade. Nova Gas Kills — Kill 20 enemies poisoned by your Nova Gas.
2000 Marathon
	Sprint for a longer duration. PRO: +Sprint for an unlimited duration. Challenges ↓ 26 Miles — Sprint 26 miles using Marathon. First Blood — Get the First Blood Medal 10 times. Captures — In Capture the Flag, get the Flag Capture Medal 15 times while using Marathon.
2000 Ninja
	Move silently. PRO: +Make no noise at all and hear enemies louder. Challenges ↓ Silent Kills — Get 150 kills using the Suppressor attachment. Back Stabs — Get 5 Backstabber Medals. Plants — Plant the bomb 10 times in Demolition, Sabotage, or Search & Destroy.
2000 Second Chance
	Pull out your pistol before dying. PRO: +Survive longer and get revived by your teammates. Challenges ↓ Kills — 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.
2000 Hacker
	Detect enemy equipment, explosives, and turrets. PRO: +Sabotage enemy equipment and turrets, booby trap stolen crates, and remain invisible to Motion Sensors. Challenges ↓ Destroys — Destroy 10 equipment or explosives while using Hacker. Explosive Kills — Kill 25 enemies with a Claymore or C4. Near Equipment Kills — Kill 25 enemies within the radius of your Jammer or Motion Sensor.