Modern Warfare 2 Perks
 | Marathon | Tier 1 |
| Standard: Unlimited Sprint
Pro: + Climb obstacles faster | ||
 | Sleight of Hand | Tier 1 |
| Standard: Faster reload
Pro: + Aim down sights faster | ||
 | Scavenger | Tier 1 |
| Standard: Full resupply from dead bodies
Pro: + Extra magazines | ||
 | Bling | Tier 1 |
| Standard: Dual attachments on primary weapon
Pro: + Dual attachments on secondary weapon | ||
 | One Man Army (replaces secondary) | Tier 1 |
| Standard: Swap classes at any time Pro: + Swap classes faster | ||
 | Stopping Power | Tier 2 |
| Standard: Increased bullet damage
Pro: + Increased bullet damage to cars and Killstreak vehicles | ||
 | Lightweight | Tier 2 |
| Standard: Move faster
Pro: + Quicker aim after sprinting | ||
 | Hardline | Tier 2 |
| Standard: Killstreaks rewards require 1 less kill
Pro: + Deathstreaks require 1 less death | ||
 | Cold Blooded | Tier 2 |
| Standard: Undetectable by UAV, air support, sentries, and thermal
Pro: + No red crosshair or name when targeted | ||
 | Danger Close | Tier 2 |
| Standard: Increases explosive weapons damage
Pro: + Extra air support damage | ||
 | Commando | Tier 3 |
| Standard: Increased melee distance
Pro: + No falling damage | ||
 | Steady Aim | Tier 3 |
| Standard: Increased hip-fire accuracy
Pro: + Hold your breath for longer when sniping | ||
 | Scrambler | Tier 3 |
| Standard: Scrambles the radar of nearby enemies
Pro: + Delay enemy Claymore explosions | ||
 | Ninja | Tier 3 |
| Standard: Invisible to heartbeat sensors
Pro: + Move silently | ||
 | SitRep | Tier 3 |
| Standard: Reveals enemy explosives and Tactical Insertions Pro: + Louder enemy footsteps | ||
 | Last Stand | Tier 3 |
| Standard: Survive (on the ground) for 10 seconds after being killed. You can use a pistol Pro: + Use grenades and equipment as well as your pistol | ||
via mw2blog.com