Overview: Ninja reduces all player noise by 75%. Its pro version completely silences the player and doubles the volume of enemy sounds. Teammates without Ninja will be heard normally by the player.
Unlike in past Call of Duty games, Ninja Pro is not limited to footsteps alone. Ninja Pro silences falling, mantling, weapon switches, equipment deployment, and more. It also more than doubles the sound of enemy footsteps, as well as amplifying enemy callouts, reloading, and equipment deployment. It is useful to know the language of your team to distinguish friend from foe.
The November 18th patch balances audio levels making player noises much easier to detect. This makes Ninja and Ninja Pro much more useful. However, even with Ninja Pro, enemies do not make nearly as much movement noise as they do in Call of Duty: Modern Warfare 2. The volume of footsteps varies widely depending on the ground surface; on some surfaces footsteps are nearly silent. Additionally, while sprinting on some surfaces footsteps seem to make noise only every third or fourth step, again minimizing the usefulness of this perk.
Ninja Pro seems to let you pick up on enemy footsteps from slightly further away but not necessarily louder. Having a line of sight definitely lets you hear the footsteps easier than if you are around a corner.
Even with Ninja Pro, players will hear themselves mantling. This may be a bug and it's unclear if enemies can also hear the noise.
The 1.04 patch further adjusts Ninja Pro: "Additional sound mix tuning for Ninja Pro users – increased ranges and volume of enemy footsteps, and removed player footstep sounds on concrete material types."
- Silenced Kills – Get 150 kills using the Suppressor attachment
- Back Stabs – Get 5 Backstabber Medals.
- Plants – Plant the bomb 10 times in Demolition, Sabotage, or Search & Destroy.
My thoughts: Used the perk a few times in my last prestige. My only disappointment is that this could of been better being a Tier 1 perk, replacing Hardline or maybe Ghost, imo. I would much rather use this perk with Marathon Pro, which I think is one thing TA fucked up on. Would of been better using it with perks like Lightweight, Marathon and Ninja. But no.