Jucătorii vor intra din nou în rolul comandantului Shepard, trimis de această data să salveze un agent sub acoperire ce deţine informaţii despre iminenta invazie a rasei Reaper. De asemenea, va putea fi întâlnit şi amiralul Hackett ce va împrumuta vocea actorului Lance Henriksen.
At the furthest edge of the galaxy, the Reapers are preparing to make their return. Will Commander Shepard have what it takes to stand in their way? BioWare is announcing today Mass Effect: Arrival, the thrilling final mission for Mass Effect 2. Available for download on March 29, 2011, Mass Effect: Arrival will also include three new achievements for the Xbox 360® videogame and entertainment system and PC and three new trophies on PlayStation®3 computer entertainment system. The PDLC pack will be available for 560 MS Points on Xbox 360, £5.49 on PlayStation Network and also available for PC for 560 BioWare Points at http://social.bioware.com/page/me2-dlc.
In Mass Effect: Arrival, Commander Shepard is sent to the edge of the galaxy to rescue an undercover operative who may have evidence of an imminent Reaper invasion that has been looming since the very beginning of the series. Returning and playing a prominent role in Mass Effect: Arrival is fan favorite Admiral Hackett, who is voiced by legendary science-fiction actor Lance Henriksen (Alien, Terminator).