The Smoker first appeared in Left 4 Dead 2, Valve's cooperative zombie shooter released in 2009, where it hides in smoke and uses its long tongue to snare survivors from a distance. Its distinctive cough became an instant audio cue for players, warning them that an ambush was nearby even before the enemy was visible. As gameplay clips, streams and soundboards spread online, the cough was lifted from its original context and reused in horror edits, reaction videos and zombie-themed shorts. It remains popular because it is instantly recognisable to fans and creates tension in just a few seconds.