Tier One[]
| Name | Description | Challenge | Pro Version |
| Recon | Explosive damage paints enemy on map for 12 seconds | Paint 100 enemies | Bullet damage paints enemy on map for 12 seconds |
| Sleight of Hand | Reload twice as fast | Kill 150 enemies while using this perk | Recover from lethal and tactical equipment and knife usage faster |
| Marathon | Run for longer distances | Run 26 miles | Run indefinately |
| Hardline | Pointstreaks require one less point | Get 120 killstreaks | Change Care Package to a new random killstreak; two assists equal one kill |
| Scavenger | Pick up bags of ammo from dead bodies | Pick up 150 bags | Start new lives with maximum ammo |
Tier Two[]
| Name | Description | Challenge | Pro Version |
| Quick Draw | Aim down sights twice as fast | Kill 80 enemies within 3 seconds of aiming down sights | Switch weapons faster |
| Blast Shield | Resistance to enemy explosives increased by 45% | Survive 20 explosions | No fall damage |
| Lightweight | Run 7% faster | Run 30 miles | Mantle objects and climb ladders twice as fast |
| Invisible | Invisible to UAV, Advanced UAV, Sentry Guns and enemy air support | Destroy 70 enemy pointstreak awards while using this perk | Red boxes due not appear for Chopper Gunner, AC-130, and Predator Missile; invisible to thermal scope |
| Overkill | Use two primary weapons | Get 130 kills with your secondary weapon | Secondary weapon can have attachments and camoflauge |
Tier Three[]
| Name | Description | Challenge | Pro Version |
| Marksman | Identify enemy targets from longer range | Get 50 kills while holding breath | Hold breath for a longer time; Invisible no longer cancels Marksman out |
| Gas Mask | Unaffected by Flashbangs, Concussion Grenades, and Gas Grenades | Kill 50 enemies impaired by your tactical grenades | See through smoke grenades; Chemical Strikes and Gas Grenades kill faster |
| SitRep | Enemy equipment appear in flashing red | Destroy 50 enemy equipment | Airdrop Traps appear in flashing red; Enemy grenades appear in flashing red |
| Steady Aim | More accurate while firing from the hip | Kill 100 enemies while firing from the hip | Recover from sprint faster |
| Ninja | Jam enemy radars within the same range as a MW3 Scrambler | Kill 50 enemies in close quarters | Enemy footsteps are four steps louder; friendly footsteps are four times quieter |