High Alert

"Your vision pulses when enemies outside of your view see you."

- Create-A-Class description

High Alert is a Tier 1 perk in Call of Duty: Modern Warfare. It triggers a yellow outline around the player's HUD when an enemy outside their line of sight it targeting them, similar to the Perception trait in Call of Duty: Infinite Warfare. It is unlocked at level 11.

High Alert does not warn the player from enemies with the Cold-Blooded perk.