- For similar equivalents, see Perception and Paranoia.
High Alert is a Tier 2 Perk featured in Call of Duty: Modern Warfare, Call of Duty: Vanguard, a Tier 3 perk in Call of Duty: Mobile and an Ultimate Perk in Call of Duty: Modern Warfare II.
Call of Duty: Modern Warfare[]
- "Your vision pulses when enemies outside of your view see you."
- — Create-A-Class description
High Alert triggers a yellow outline around the player's HUD when an enemy outside their view sees them, similar to the Perception trait in Call of Duty: Infinite Warfare. The perk will also be triggered when an enemy Wheelson, IAV, or Chopper Gunner is targeting the user, but does not warn them from enemies with the Cold-Blooded perk.
In Call of Duty: Warzone, High Alert also allows players to hear footsteps from enemies using Dead Silence.
Call of Duty: Mobile[]
- "Your vision pulses when enemies outside of your view see you. Mark enemies, their equipment, and their scorestreaks by aiming down your sights."
- — Description
High Alert returns in Call of Duty: Mobile as a Tier 3 perk. It was added during the Season 10 The Hunt update.
It functions identically like Modern Warfare version, triggers a yellow outline around the player's HUD, when an enemy outside their view sees them. It also mark the enemies, their equipment, and their scorestreaks by aiming down sights at the item of interest.
Call of Duty: Vanguard[]
- "Your vision pulses when enemies outside of you view see you."
- — In-game description
High Alert returns in Call of Duty: Vanguard as a Tier 2 perk.
Call of Duty: Modern Warfare II[]
- "Vision pulses when spotted by an enemy player outside of view."
- — In-game description
High Alert returns in Call of Duty: Modern Warfare II as a Ultimate Perk.
Call of Duty: Warzone 2.0[]
- "Vision pulses when spotted by an enemy player outside of view.
Triggered by enemies controlling Chopper Gunners, Wheelsons, IAVs, and APCs." - — In-game description
High Alert returns in Call of Duty: Warzone 2.0 as a Perk.
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