One year ago Overkill Software (now part of Starbreeze Studios), released Payday: The Heist and in order to celebrate this they're having a free weekend on Steam, along with a 75 percent discount on the game, the fourpack and the DLC (Wolfpack).
Payday: The Heist is a co-operative robbery simulator, where players will scout a location, pull a heist and attempt to escape.