Mass Effect 2: Arrival is a downloadable content pack developed by BioWare and published by Electronic Arts for the action role-playing video game Mass Effect 2. It was released on March 29, 2011 for Microsoft Windows, PlayStation 3, and Xbox 360. The pack introduces a new mission where the player assumes the role of Commander Shepard, an elite human soldier who must stop an imminent invasion of a highly advanced machine race of synthetic-organic starships.