Ninja



Ninja is a Tier 3 perk appearing in Call of Duty: Modern Warfare 2 that makes the player invisible to the Heartbeat Sensor attachment.

The Pro version of this perk (unlocked by making 50 "close-quarters" kills with the perk equipped) reduces the player's movement noise volume (including footsteps, mantling and climbing noise) by 75%, taking the place of Dead Silence. The distance that constitutes "close-quarters" for unlock purposes is unknown (but 50 melee kills exactly will unlock Pro version of this perk), but speculation is that it may be the maximum range at which the Tier 3 Perk "Scrambler" can affect the target's radar, as Scrambler has a similar "close quarters kill" challenge. SitRep Pro directly negates the noise-dampening effect, allowing the user to hear the Ninja at regular volume, but SitRep users seem to be extremely rare in most games.

Ninja is most useful in games such as Sabotage and Search and Destroy as players with Heartbeat Sensors often wait by the objectives, though it is generally useful in all game types due to the widespread use of Heartbeat Sensors and the relative weakness of many other Tier 3 perks.

This perk is unlocked at rank 29.

Trivia

 * Even with Ninja Pro, you will still make a loud cracking sound when falling from an elevated height, just like its predecessor, Dead Silence did.
 * Ninja Pro actually reduces footstep sounds to a fourth of their original volume, but this is still extremely quiet. Strangely, it is not canceled out by SitRep Pro.