Payday: The Heist getting Left 4 Dead's "No Mercy" map
It looks as though the Overkill and Valve cross-over project with left 4 Dead undertones is the No Mercy map.
According to a video posted by Overkill, and hastily removed, the video shows the bank robbers from Payday: The Heist inside the hospital from the first L4D campaign.
Speaking with Kotaku, Valve's Chet Faliszek said players will see one of the L4D characters in the hospital and a "fun little easter egg with a payoff later in Left 4 Dead."
Faliszek said this was Valve "having some fun with a studio we are friends with and who have also made a great co-op game."
"This is a 100% Overkill made mission for Payday: Heist simply set in no mercy hospital from the Left 4 Dead series," he said. "It is not telling the origins of the Infection and is not canon.
Earlier rumors pegged the two studios as working on a L4D prequel, but Faliszek said this was false.
As mentioned above, the video was removed, but not before someone else pulled it. Watch it below.
A released date for the map hasn't been announced.