Call of Duty Zombies began as a bonus survival mode in Call of Duty: World at War, released in 2008, and later became a recurring part of the game series. This clip is labeled as a COD zombie sound, although its exact installment and scene are not identified. Short undead noises from the mode spread through gaming edits, soundboards, streams, and horror videos because they quickly signal an approaching enemy. It remains useful alongside effects such as the FNAF jumpscare scream for sudden horror reveals and gaming reactions.