http://store.steampowered.com/app/24240/

About This Game
PAYDAY™ The Heist is an action filled first person shooter that lets players take on the role of a hardened career criminal executing intense, dynamic heists in constant pursuit of the next “big score”. Load out with an array of weaponry and equipment. Navigate six high-stake heists with three other live or A.I. Co-Op partners in crime.
Time for a PAYDAY™ - Cash in Before you Cash Out!

Key Features:
Six High-Intensity Heists
Interactive 4-Player Co-Op play
Endless Replayability
Massive Character Progression Tree
Build Your Skills to Fit Your Preferred Form of Violence
Hostage Trading
More DLC: Additional heists, weapons and equipment means PAYDAY™—a digitally distributed AAA quality title for less than half the price of a retail game—is total OVERKILL