1st Lt. - Attaining rank of 1st Lieutenant (Level 34)
1st Sgt. - Attaining rank of 1st Sergeant (Level 13)
1bullet2kills - Complete the challenge Collateral Damage
2Fast - Complete the challenge Slight of Hand Pro I
4 the Record - (unknown)
6fears7 - Earn killstreak rewards requiring 7,8, and 9 kills.
<3 - Misery Loves Company challenge
Absentee Killer - Get a Game Winning Killcam with a Sentry Gun
Afterburner - Call in 50/100 airstrikes
Airborne - Call in 3 Pavelows getting the 21 ton giant challenge
All Pro - Complete the All Pro challenge
All Your Base - Complete challenge Extreme Cruelty
Accident Prone - Fall 15 feet and survive.
Amplifier - Call In A UAV
Angel of Death - Call in 10 AC-130s
Armed and Dangerous - Complete challenge Bling Pro VI
Art of Stealth - Get Ninja Pro VI
AUG HBAR - Unlock all of the AUG HBAR attachments
Backfire - Kill the person who planted the C4 or Claymore by shooting it
Backsmasher - Complete Backsmasher challenge
Backstabber - Complete challenge Backstabber
BAM! - Complete challenge Never Forget
Bandolier - Resupply 250 times while using Scavenger
Barrett .50 cal - Unlock all .50 cal attachments
Behind Enemy Lines - Get 10 kills without having any killstreaks equipped.
Big Bada Boom - Get 5 RPG Multi-Kills
Big Brother - (unknown)
Bite the Bullet - 1000 kills with stopping power
Blindfire - Complete the Blindfire challenge
Bling Bling - Complete Bling Pro V Challenge
Blood Brothers - Complete Team Player II
Blood Money - Get payback with a headshot 5 times
Blunt Trauma - Get 2 kills using the riot shield
Boilermaker - Kill 5 enemies by exploding a car
Bomb's Away! - (unknown)
Bombshell - Kill the bomb carrier in Sabotage or S&D
Boom Boom - Multi C4 I
Boom! Headshot - LMG Expert II
Booted - Kill 100 teammates
Booyah! - (unknown)
Bounty Hunter - Steal 50 Enemy Crates
Bow Down - Crouch Shot II
Broken Arrow - 50 Airstrikes
Bulletproof - DEFLECT a total of 10000 bullets with a riot shield
Bullseye - Complete Plastered I
C4 And After - Unlock the challenge C4 Shot I
Carpet Bomber - Kill 5 enemies with single airstrike
Catch Shrapnel - Kill an enemy with a claymore.
Charity Case - Take 3-5 crates from teammates airdrops.
Cheater - (unknown)
Chick Magnet - Call in 2 EMPs
Click Click Boom - Kill an enemy with C4 while you are in Last Stand.
Cloak and Dagger - Complete the Carnie I Challenge
Close Support - Complete Hardline VI Challenge
Cluster Bomb - (unknown)
Cobra Strike - Call in 10 Chopper Gunners.
Companion Crate - Complete Air Mail II Challenge
Completely Numb - With painkiller get 100% of normal damage from an explosion and live
Concussive Barrage - Hurt an enemy & then finish him off with a stun grenade.
Counterintelligence - Complete Scrambler Pro VI challenge
Crackin' Skulls - Complete Assault Rifle: Expert II challenge
DZ Clear - Call in Supplies 5 times .
Dead Man's Switch - Hurt enemy & finish him off with your pistol on Last Stand
Deadline - Complete Hardline Pro V Challenge
Death From Above - Get last kill of match with AC-130
Decathlete - Run 104 miles with Marathon
Destroyer - Plant explosives and destroy the objective.
Devastator - Complete Tango Down Challenge
Dictator - Complete the Dictator Challenge
Direct Connect - (unknown)
Dishes are Done - Get a payback kill with a claymore
Dish the Rock - Most assists in a game
Disruptor - Obtained by completing Scrambler Pro I challenge.
Double Agent - (unknown)
Double Down - Get 25 kills using the Bling perk
Drifter - Destroy a car
Dronekiller - Last kill in a match with a Predator Drone
Droppin' Crates - Get the last kill in a match by dropping a Care Package on the enemy.
Dying Breath - 100 last stand kills.
Early Detection - (unknown)
End of Line - Call in 5 Tactical Nukes.
Enemy of the State - Complete Enemy of the State Challenge
Enemy with benefits - Group hug challenge
EOD - (unknown)
Epic - (unknown)
Kill the whole enemy team within 10 seconds. - (unknown)
Excalibur - 100 knife kills
Explosive Ordinance - (unknown)
Eyes Above - (unknown)
FAL - Unlock all FAL attachments
F.N.G. - Unlocked from start
FAMAS - Unlock all FAMAS attachments
Faceoff - 5 headshots with an assault rifle
Fast Track - Run/sprint?
Finishing Touch - Get the winning kill in a match with a Precision Airstrike
Fired! - Complete the "You're Fired" challenge
Fire and Forget - Call in 25 Sentry Guns
Flatliner - Complete The Brink challenge
Flying Tank - Call in 10 Pave Lows
Flyswatter - Shoot down an enemy helicopter
Frag Out - Complete Grenade Kill I challenge
Freerunner - Complete Marathon V challenge
Friends with Benefits - Kill an enemy by sticking semtex to an ally
Full Arsenal - First One Man Army challenge
Full Force - Get 10 explosive kills while using danger close.
Full Throttle - (unknown)
Gat Trigger - (unknown)
Gen. - Reach Rank of General
Get Real - Win one game of Hardcore Team Deathmatch
Get to the Choppa! - Call in 3 Chopper Gunners
Ghillie in the Mist - Complete Challenge Ghillie in the Mist II
Ghostrider - Complete Air to Ground II
Givin' Static - Call in 5 Counter-UAVs
Global Thermonuclear War - Call in 2 Nukes
Godhand - Complete the challenge AC130 Veteran I
Grassy Knoll - Complete Gillie in the Mist I
Hair Trigger - Complete Slight of hand V
Hands Free - X Number of kills with sentry gun.
Hardcore Only - Complete Hardcore Team Player II
Hard Target - Complete "Airborne" Challenge
Hard To Kill - Get 2 kills while in Final Stand
Headrush - (unknown)
Heartbreaker - (unknown)
Hello! My Name is...... - (unknown)
High Caliber - Use Stopping Power?
High Command - (unknown)
Hijacker - Steal 100 enemy care packages
Highlander - Finish an entire match without dying
Hired Gun - (unknown)
Hi Def - Get the game winning kill cam with a chopper gunner.
Hot Shot - (unknown)
How The? - Kill an enemy by using bullet penetration to blow up an explosive through a wall.
I.C.E. Man - (unknown)
ID Thief - Use Copycat in a match, and kill the player that you copied.
I'm Rich - Get 5 Payback kills using C4
Impaler - Complete the challenge Commando Pro I
Intergalactic - Win 20 Sabotage matches.
Invisible - Complete Cold Blooded Pro I Challenge
Iron Lungs - Getting 200 hip fire kills while using Steady Aim Pro
It's Personal - Complete the 'It's Personal' Challenge
It's Sabotage - Win 5 Sabotage Matches
Jack-in-the-Box - Kill an enemy within 5 seconds of spawning via Tactical Insertion 10 times
Joint Ops - Kill an enemy hidden by smoke from a smoke grenade
Juggernaut - Complete "Solid Steel: III" Challenge
Jump Jet - Get 5 Harrier airstrikes.
K Factor - 100 bullet penetration kills.
Kill For Good - (unknown)
Kleptomaniac - Steal an enemy's care package.
Lights Out - Complete the Think Fast Flash challenge.
Live Long... - Live for 5 consecutive minutes.You must complete the challenge "Survivalist" for this to unlock.
Living Dead - Survive in Final Stand long enough to get back up.
Lone Wolf - Win (finish in the top 3) free-for-all 3 times
Look! No Hands! - (unknown)
Low Profile - Prone shot II
M16A4 - Get all M16A4 weapon attachments.
M4A1 - Get all M4A1 weapon attachments.
Mad Man - Get 5 revenge kills with frag grenades
Maj. - Reach Rank of Major
Martyr - Kill one enemy with martyrdom death streak perk
Mastermind - Get 15 Claymore Kills
MMMMM... Brains - Complete Both Barrels Challenge
MOAB - Use a Tactical Nuke
Money Shot - Get a payback in the game winning killcam.
MVP Assassian - (unknown)
My Li'l Pwny - You get it by getting 10 silenced kills after prestiging.
NBK - Get 3 Longshot Kills in one life
Nerves of steel - Complete the Colour of Money Challenge or Steady Aim Pro VI
New Jack - Get payback with a throwing knife.
Ninja - Kill 50 people with your knife or riot shield using the Commando perk
No. - Kill someone cooking off a grenade before they throw it
Noob Tuber - Complete Ouch! Challenge
Not in the face! - Be killed with a direct impact grenade from a launcher to the head
OG - Get last kill of match with Attack Helicopter
OMFG - Complete Cruelty challenge
Omnicide - Complete Omnicide! Challenge
Omnipotent - Call in 50 UAVs
One Inch Punch - Complete the Sleight of Hand VI Challenge
Overwatch - Call in 5 UAVs
Owned. - Get last kill of match using a Riot Shield.
P90 - Unlock all attachments for the P90
Perfectionist - Fire an entire Sniper magazine into your enemies without missing
Philanthropist - Allow 50 teammates to take your airdrops.
Phoenix Rising - (unknown)
Pineapple Express - Get 25 kills with frag grenades
Plane Whisperer - Complete Airstrike Inbound I
Plastique - Complete the first C4 Challenge.
Pop Off - Complete SMG Head Shot II
Preemptive Strike - Hardline Pro I
Protect and Serve - Complete Sponge I with riot shield
Pro Gambler - (unknown)
Public Enemy - Win MVP Team Deathmatch
Pushin' Daisies - Fall to your death.
Pyromaniac - Complete Backdraft I
Quick Change Artist - Get 300 Kills with One Man Army
Quick Draw - Complete Fast Swap challenge
Rainmaker - Get a payback kill by sticking the enemy with a Semtex.
Rain of Fire - Complete Air to Ground I
Ready. Aim. Fire! - (unknown)
Reign Down - Call in 5 attack helicopters
Rejected - Get Backdraft II challenge
Reloaded - First scavenger challenge
Remote Viewer - X-Ray Vision I
Re-Zero - Complete Gillie In The Mist III
Rival - Kill the same enemy 5 times in a single match
Robin Hood - Get 5 revenge kills using last stand.
Rolling Thunder - (unknown)
S.S.D.D. - Reach Private class
S.S.S.G - (unknown)
Sarge - (unknown)
Scar-H - Get all attachments for SCAR H.
Schooled - (unknown)
Sgt - Reach Rank of Sergeant
Share Package - Have a teamate secure 3 emergency air drops
Shock and Awe - (unknown)
Shot Down - Complete Crouch Shot I
Shot Over - (unknown)
Sidekick - 3 kills in a row with your secondary weapon
SIGINT - Call in 25 Counter-UAVs
Silence - (unknown)
Silent Shot - (unknown)
Silent Strike - Complete challenges for the 'Ninja' perk.
Silent Veteran - Get 50 silenced weapon kills after you prestige
Skeet Shooter - Complete the Hard Landing Challenge
Sky Commander - (unknown)
Smash Hit - 3 Kill Streak with a Riot Shield Melee.
So Baked - Kill 5 enemies with cooked grenades.
Solid Steel - Complete Solid Steel I Challenge
Sonic Boom - Complete Danger Close Pro V challenge
Spectre - (unknown)
Speed Demon - Complete Lightweight Pro I Challenge
Spy Game - Get the Ninja Pro V challenge
Squawk Box - 50 attack helicopters called
Starfish Prime - Call in 5 EMPs
STD - (unknown)
Stickman - Complete the 'Stickman' Challenge.
Straight Up - (unknown)
Streaker - Get 10 kills in a row without dying.
Stuck on You - Complete Plastered II
Stun Gun - Complete Slow But Sure challenge
Submit to Authority - X-Ray Vision II
Suppressor - 250 kills with silencer
Sureshot - Complete Steady Aim Pro I
Surgical - Go through an entire magazine of assault rifle ammo without missing a shot.
Survivor - Complete The Survivor
Ta Da! - Complete the Jack-in-the-Box:II challenge.
TacDel - Complete Tactical Deletion challenge
Take a Stab - Complete the Carnie II challenge
Tango Down - Kill every member of the opposing team.
Team Player - Win 5 Team Deathmatch Games
Techno Killer - Get a game winning killcam with a stealth bomber
Tha Bomb - Kill bomb planter 10 times
The Automator - (unknown)
The Avenger - Avenge the death of 3 teammates
The Bigger They are... - Kill the number one player on the enemy team 3 times in a row
The Denier - Complete The Denier Challenge
The Feared - Come 1st, 2nd or 3rd in 3 Free-For-All matches.
The Grim Reaper - Kill 5 members of the enemy team with a single Predator missle
...The Harder They Fall - Kill the number one player on the enemy team 5 times in a row
The Invincible - (unknown)
The Legend - Be the last man standing on your team in a search and destroy match.
The Mad Bomber - Plant two bombs in Search and Destroy or Sabotage.
The Mastodon - Complete the Star Player challenge. Get a 5:1 kill death ratio
The Prestige - Prestige 1 time and reach lvl 5.
The Ripper - Get a 3 kill streak with your knife
The Specialist - Reach level 9.
The Watchman - Call in 100 UAV's or Counter UAV's
Think Fast! - Direct impact kill using Frag grenade
Time is Money - Get 5 payback kills with semtex grenades
Time on Target - 5 Precision Airstrikes
To the Extreme - Win a Team Hardcore match with the top score
Top Gun - (unknown)
Toxic - Get Nuked. You must be alive when the nuke detonates.
Trackstar - Complete the challenge Marathon Pro I
Transformer - Get a Game Winning kill with a Pave Low
True Liar - Get the last kill of a match with a Harrier
UAV Jammer - (unknown)
Unbelievable - Get a game winning kill with a throwing knife
Unbreakable - Deflect 10 explosions with the riot shield
Voyeur - Call in 25 UAVs
Vulture - Complete the Challenge Scavenger VI
Wargasm - Complete the "Wargasm" challenge
X-Ray Vision - X number of Bullet Penetration Kills
Thanks For Viewing!

-John.