The special Left 4 Dead-themed level for Payday: The Heist is now available as downloadable content. “Mercy Hospital” ties in with the zombie apocalypse co-op game by taking place in the same hospital level from the game, but before the outbreak.
News of a collaboration between Valve and Payday: The Heist developer Overkill Software had gamers excited over a possible Left 4 Dead prequel, but that rumor was shot down quickly.
