Left 4 Dead is a cooperative zombie survival shooter released by Valve in 2008, built around four survivors fighting through hordes to reach a rescue point at the end of each campaign. The escape sequence became one of its most replayed moments, because the finale turns tension into a frantic run for the helicopter, boat or other rescue vehicle. Clips of that music later spread through gaming videos and edits, where creators reuse it as shorthand for any last-minute getaway, and it remains popular because that tension is instantly recognisable even to viewers who never played the game.