We are very pleased to officially announce that the Mass Effect 3 Leviathan single-player DLC will be released on August 28th, 2012 for PS3, Xbox 360, and PC. Please note that on Playstation 3 in Europe, it will be available on August 29th.
Taking place during the events of Mass Effect 3, players will be thrust into the darkest corners of space where they will hunt a mysterious being rumored to be powerful enough to destroy a Reaper. As they race against time, they will begin to unravel the secret of the Leviathan. Explore uncharted systems and new areas on the Citadel, interact with brand new characters, unlock the AT-12 Raider shotgun and M-55 Argus Assault Rifle and discover more about the mysterious history of the Reapers. Available on PC, Xbox 360 and Playstation 3. Cost is $10 or 800 Microsoft points.
via BioWare Blog