Fallout 4 is a 2015 action role-playing game developed by Bethesda Game Studios and published by Bethesda Softworks. It is the fourth main game in the Fallout series and was released worldwide on November 10, 2015, for PlayStation 4, Windows, and Xbox One. The game is set within an open world post-apocalyptic environment that encompasses the city of Boston and the surrounding Massachusetts region known as "The Commonwealth".