Left 4 Dead is a cooperative zombie shooter from Valve, first released in 2008, and its tense, punchy audio has long been reused beyond the game itself. Short clips from the series circulated on soundboards and in gaming videos, where players used them to recreate the feeling of a sudden attack or a narrow escape without needing footage from the original match. Because the sound is so brief, it fits easily into memes, streams and short-form edits, and it remains recognisable to players who remember the original games even when it is heard out of context.