Valve and Overkill have just revealed the collaboration they’re working on: it’s a heist level for Payday: The Heist called Payday: No Mercy, set in Mercy Hospital where, it appears, the bank robbers from Payday begin the infection that leads to the events of Left 4 Dead.

Brilliant. The trailer’s below.

There’s some interesting lines in there:

1. 0.37: “We’re hereto draw some blood from a guy that they have in quarantine.”

2. 1.38: “You’re beep 4 dead.”

Valve previously denied this collaboration was a full prequel to us at E3.

See thePayDay 2trailer here…