Mass Effect 3 is an upcoming action role-playing game developed by BioWare and published by Electronic Arts for Microsoft Windows, Xbox 360 and PlayStation 3. Officially announced on December 11, 2010, it was scheduled for release "sometime in holiday 2011". However, it was revealed in June 2011 that the launch date has been put back to 6th March 2012 and will mark the third and final chapter in the Mass Effect trilogy of video games.
Gameplay in Mass Effect 3 will be influenced by decisions from Mass Effect and Mass Effect 2 and will include locations throughout the galaxy, including Earth and Mars. Combat has been changed and refined; in particular, the cover system has been improved, there will be more options for moving around the battlefield, instant melee kills and conventional grenades will be introduced, and there will be increased artificial intelligence.
Earth is burning. Striking from beyond known space, a race of terrifying machines have begun their destruction of the human race. As Commander Shepard, an Alliance Marine, your only hope for saving mankind is to rally the civilizations of the galaxy and launch one final mission to take back the Earth.
Mass Effect 3 will follow from the events of the Mass Effect 2 DLC expansion Arrival and follow Commander Shepard as he/she tries to save the galaxy from the Reapers by rallying civilizations of the galaxy together, while also having to deal with Cerberus, who have decided to turn against him/her.