 "Mass Effect 2" was formally unveiled at the Game Developers Conference on March 17, 2009, accompanied by a teaser trailer which declared Shepard to be "killed in action".The announcement confirmed that the game would be released for both Microsoft Windows and Xbox 360.In June 2009, the game was presented at the Electronic Entertainment Expo, where it was confirmed that Shepard would be alive and playable in "Mass Effect 2", but the character could die at the end of the game.