Call of Duty: Modern Warfare 2, released in 2009, featured several night operations where soldiers relied on night vision goggles, and this intro sound became closely associated with those tense, low-light missions. As gameplay clips and montages spread on YouTube and TikTok, editors began reusing the activation cue to signal a shift into stealth mode. It remains popular alongside other tactical shooter cues such as Enemy Spotted and bomb has been planted because it instantly tells viewers a covert phase is starting.