Getting pro perks in Black Ops is a little different than it was in MW2. There are a set of 3 challenges for each perk to unlock the perk. Even once completed, you still must purchase the upgrade perk for the pro version.
Complete list of all Black Ops Perks. - This list has this information too.
Tier 1
How do I get Lightweight Pro?
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.
How do I get Scavenger Pro?
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.
How do I get Ghost Pro?
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.
How do I get Flak Jacket Pro?
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.
How do I get Hardline Pro?
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.
Tier 2
How do I get Hardened Pro?
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.
How do I get Scout Pro?
Secondary Kills – Get 50 kills with secondary weapons.
One Shot Kills – Get 50 One Shot, One Kill Medals.
Headshots – Get 30 Headshot kills.
How do I get Steady Aim Pro?
Quick Melee – Melee two enemies consecutively within 5 seconds.
Sprint Kills – Get 100 kills after sprinting.
Hip Fire Kills – Get 150 hip fire kills using Steady Aim.
How do I get Sleight of Hand Pro?
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.
How do I get Warlord Pro?
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.
Tier 3
How do I get Marathon Pro?
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.
How do I get Ninja Pro?
Silenced 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.
How do I get Second Chance Pro?
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.
How do I get Hacker Pro?
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
How do I get Tactical Mask Pro?
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
How to get Pro Perks in Black Ops
Linear Mode
