This is (simply) how perks work in Modern Warfare 2

Put simply, the 4 ways perks work in modern warfare 2.

  1. You start with 2 ‘base perks’.
  2. After around 4-minutes, you unlock your third ‘bonus perk’.
  3. After around 8-minutes, you unlock your ‘ultimate perk’.
  4. Yes, kills, assists, and game objectives will unlock your perks faster.

What are the perks?

You have the option to customise your own perk package. Here’s each perk, what it does, and when you can unlock them.

Base Perks

IconNameEffectUnlocked At
Double TimeDouble the duration of tactical sprint. Increase crouch movement speed by 30%.Unlocked
Strong ArmThrow equipment farther and see a preview of the trajectory.Unlocked
Bomb SquadTake reduced damage from non-killstreak explosives. Reset fuse timers when picking up live grenades.Level 11
Extra TacticalSpawn with an additional tactical.Level 18
ScavengerResupply ammo and throwing knives from dead players.Level 26
OverkillCarry two primary weapons.Level 31
Battle HardenedReduce the effect of enemy flash, stun, EMP, gas grenades, and shock sticks. Immune to snapshot grenades.Level 37
TrackerEnemies leave behind a footprint trail, and enemy death markers are visible. Kill markers are hidden from the enemy team.Level 39

Bonus Perks

IconNameEffectUnlocked At
HardlineReduce killstreak cost by one elimination. Reduce Scorestreak cost by 125.Unlocked
Fast HandsReload, use equipment, and swap weapons faster.Level 8
Cold BloodedUndetectable by AI targeting systems and thermal optics. Does not trigger High Alert warning. Does not highlight in enemy tactical cameras, recon drones, and spotter scopes.Level 28
ResupplySpawn with an additional lethal. Equipment recharges over 25 seconds.Level 30
SpotterSee enemy equipment, field upgrades, and killstreaks through walls. Highlight them for your team by aiming down sight. Hack enemy claymores, proximity mines, C4, and trophy systems.Level 41
FocusIncreased hold breath time. Reduced sway and flinch when ADS.Level 50

Ultimate Perks

IconNameEffectUnlocked At
OverclockStore an additional field upgrade charge. Increase field Upgrade charge rate by 40%. ON-EARN: Get a field upgrade charge.Unlocked
High AlertVision pulses when spotted by an enemy outside of view.Level 14
SurvivorOn death, enter last stand with the ability to self-revive once per life. Teammates can revive downed players faster.Level 34
Quick FixKilling players immediately triggers health regeneration. Capturing and holding objectives increases health regeneration rate.Level 44
BirdseyeThe minimap is zoomed out. UAV and radar pings reveal the enemy’s direction. ON-EARN: Activates one local UAV sweep.Level 47
GhostUndetectable by UAVs, portable radars, and heartbeat sensors.Level 52