Left 4 Dead is a cooperative first-person shooter developed by Valve and released in 2008, set during a zombie outbreak in which survivors must fight their way to safe rooms and rescue points. Its tense sound design helped make gameplay clips easy to recognise, and short extracts have since circulated widely on gaming soundboards and in edited videos. Because the game remains a cult favourite among cooperative shooter fans, its audio still works as shorthand for panic, danger, and a run going badly wrong.