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 and is unlocked at rank 29.

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.

Ninja is most useful in games such as Sabotage and Search and Destroy as players with Heartbeat Sensors often wait by the objectives, but it is often useless in other game types due to the rarity use of Heartbeat Sensors. Earlier in Modern Warfare 2's multiplayer there were more Heartbeat Sensors and so Ninja perk was more useful.

Trivia

 * Even with Ninja Pro, players will still make a loud cracking sound when falling from an elevated height. Just like its predecessor, Dead Silence.
 * Ninja Pro actually reduces footstep sounds to a fourth of their original volume, but this is still extremely quiet and will almost never be heard.
 * Ninja Pro and SitRep Pro do not cancel out. Players using SitRep Pro will only be able to hear Ninja Pro users slightly more easily than players who are not using SitRep Pro.
 * It is a good idea to use Ninja in conjunction with Cold-Blooded and a silenced primary weapon as it effectively lets the player be invisible to all forms of detection other than direct sight.
 * Sometimes even with Ninja or Ninja Pro you can be seen on a Heart Beat Sensor