BioWare has announced that the demo for Mass Effect 3 will be available beginning February 14, 2012. The extensive demo will allow players to experience the all-out galactic war against an ancient alien race known as the Reapers from multiple fronts, including the mind-blowing opening attack on Earth that kicks off the single-player campaign. Players will go deeper into the campaign and also get a taste of the franchise’s new co-operative multiplayer mode as they preview the epic story.