Payday map is no L4D prequel

The upcoming No Mercy map for {Payday: The Heist}, has been described as something of a prequel to {Left 4 Dead}, but Valve has now set the record straight.

"This is a 100 per cent Overkill made mission for {Payday: The Heist} simply set in No Mercy hospital from the {Left 4 Dead} series," Valve's Chet Faliszek tells Kotaku.

Valve revealed the it's more of a casual link between the two developers:

"It is not telling the origins of the Infection and is not canon. There is a little cameo from one of the L4D characters (the comic should give you a hint) and a fun little Easter Egg with a payoff later in {Left 4 Dead}. Just us having some fun with a studio we are friends with and who have also made a great co-op game."

The Youtube video released for the new map (now removed) had Overkill describing the map as follows:

"Have you ever wondered how the {Left 4 Dead} series began? It started with a heist!"