Mass Effect 2: Arrival is a downloadable content pack developed by BioWare and published by Electronic Arts for the 2010 action role-playing video game Mass Effect 2. It was released for Microsoft Windows, PlayStation 3, and Xbox 360 in 2011. Set within the Milky Way galaxy during the 22nd century, Arrival follows the story of Commander Shepard, an elite human soldier who must stop an imminent invasion of a highly advanced machine race of synthetic-organic starships that plan to conquer the galaxy.