Shortly after Payday devs, Overkill, announced that they were working on something with Valve, rumours began to pop up suggesting that that something could be a prequel to Left 4 Dead. That might sound like a promising idea, but it isn't happening. Valve developer Chet Faliszek put a swift "woah, nelly!" on those rumours in a chat with PCGamesN.
"I want to make sure that people don't think the