Wolfenstein: The Old Blood is an action-adventure first-person shooter video game developed by MachineGames and published by Bethesda Softworks. It was released on May 5, 2015 for Microsoft Windows, PlayStation 4, and Xbox One. The game is a stand-alone expansion pack in the Wolfenstein series, and aprequel to 2014's Wolfenstein: The New Order. Set in an alternate history 1946, the single-player story follows war veteran William "B.J." Blazkowicz and his efforts to discover the locations of a Nazi compound. Development began in 2014, soon after the release of The New Order.