Overkill working with Valve on "in-depth" Payday/Left 4 Dead "collaboration"

Overkill Entertianment has announced it's working with Valve on what it calls an "in-depth collaboration" involving Payday: The Heist and Left 4 Dead.

Hints of the crossover started creeping into Payday: The Heist, but today came official confirmation.

“As perceptive gamers will have noticed, several hints have recently been dropped into Payday The Heist, which has led to various rumors," said studio game director Ulf Andersson.

"We are excited to be able to confirm that an in-depth collaboration between Overkill and Valve is currently in production.

"We are working on a very cool blend of PAYDAY and Left 4 Dead. I am sure it is so exciting that it will have some players check into the hospital before we are done.”

Overkill was recently bought out by Syndicate studio Starbreeze. It has been suggested the studio will work on a Payday sequel, as well as work alongside Starbreeze on Project Mercury and V13.