Combining new heists like Counterfeit and Undercover with some new weapons like the AK Rifle, Grenade Launcher and Sentry Gun, the Wolfpack DLC promises the expand the game even further.

This is of course not counting the random carnage and mayhem gamers have learned to associate and like the game for.

Developed by Overkill Entertainment, Payday: The Heist and the Wolfpack DLC are only available for the Playstation 3 and PC.

A “reliable source” has told CVG that Overkill Entertainment, developers of Payday: The Heist, are working in collaboration with Valve on a Left 4 Dead prequel, focusing on the zombie outbreak.

The game’s supposed to feature gameplay elements from both, Payday and the Left 4 Dead series.

“[It’s a] very cool blend of Payday and Left 4 Dead,” Playdead announced this themselves a little while back.

“As perceptive gamers will have noticed, several hints have recently been dropped into Payday: The Heist, which has led to various rumors,” reads a statement. “

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.”

This certainly sounds interesting. Legit? Not legit? Tell us what you think in the comments section below.