Scavenger is a Tier 1 perk in Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, Call of Duty: Modern Warfare 3 and Call of Duty Online, a Tier 2 perk in Call of Duty: Black Ops II, Call of Duty: Black Ops III and Call of Duty: Infinite Warfare, a Tier 3 perk in Call of Duty: Advanced Warfare, and an Awareness perk in Call of Duty: Ghosts.