Official Modern Warfare 4 progression and customization artwork
PERK 3 PERK / UNLOCKS AT PLAYER LEVEL 36

Cold-Blooded

Cold-Blooded is a Perk 3 Perk in Modern Warfare 4, unlocking at player level 36.

SLOTPerk 3
UNLOCK LEVELPlayer level 36
SOURCEOfficial launch guide
01

What it does

Undetectable by AI Targeting Systems, Thermal Optics, Recon Drones, Spotter Scopes, Snapshot Grenades, and High Alert.

02

Where it sits in the unlock curve

Slot three holds the late unlocks, with the final Perk in the game not available until level 36.

03

How to choose it

Perk effects change between Call of Duty entries, so a Perk that solved a problem in an earlier game may behave differently here. Test it in the firing range against the problem you actually have, rather than taking a tier list as settled.

SOURCES & LIMITS

Where this comes from

Reviewed October 21, 2026. Unlock criteria and descriptions are quoted from Activision’s own launch guide. Anything marked as this site’s judgement is labelled as such.

↗ Official launch equipment guide with Perk levels and effects