Valve’s Left 4 Dead franchise is one of the most popular in gaming and for good reason. It made the zombie genre fun again by pushing the focus on co-op survival (or betrayal) while complimenting the normal zombies with unique infections. The Left 4 Dead comics have gone a long way to fleshing out the story, but what caused it all?

A recent trailer from the guys who made Payday: The Heist shows a wonderful what-if scenario where the robbers from the aforementioned game try to pull a heist at the hospital from No Mercy. All the assets except for the environment come from Payday, but it’s still a super slick trailer. It’s been confirmed that the guys behind Payday, Overkill Studios, were collaborating with Valve on a game and many saw this as that game.

Unfortunately, the trailer is not indicative of any Left 4 Dead prequel or anything like that. In a statement to Kotaku, Chet Faliszek said the trailer is the result of some “over-excited marketing guys.” The trailer is not meant to be canon or anything, but it does contain some cameos and easter eggs from Left 4 Dead for fans to find. It might not be canon, but part of me really wishes it was. Just imagine having to pull off a bank heist in the middle of a zombie apocalypse. It would be absolute chaos and a blast.

Check out the trailer below to see the perfect combination of the two best co-op shooters of the last generation: