Left 4 Dead is a co-operative first-person shooter developed by Valve and released in 2008, built around four survivors fighting infected hordes through short campaigns. Its short UI, alert and creature cues became familiar to a generation of PC and Xbox players, and clips were later ripped and shared on soundboards and in video edits. Like the FNAF jumpscare scream, this kind of brief horror cue survives because it communicates danger instantly without dialogue, making it useful long after the original match has ended.