'' Mass Effect '' was officially announced at the X05 trade show in Amsterdam on October 4 , 2005 , as an Xbox 360 exclusive . In May 2006 , a demo of the game was presented at the Electronic Entertainment Expo ( E3 ) and subsequently won Best Role Playing Game at the Game Critics Awards . IGN editors awarded the game for Best Graphics Technology and Most Innovative Design at their Best of E3 2006 Awards . They also listed it as one of the most anticipated games of 2007 . New features of the game were detailed at the X06 trade show in Barcelona in September 2006 , while the first hour of gameplay was shown at the Game Developers Conference in San Francisco in March 2007 . '' Mass Effect '' was then presented at E3 in July 2007 , where it received Game Critics Awards for Best Console Game and Best Role Playing Game , and at the Games Convention in Leipzig , Germany in August 2007 . The game 's release date was announced on August 30 , 2007 . If the game was pre-ordered at certain retailers in Australia , players could receive a complimentary bonus disc which included a five-minute behind-the-scenes documentary , tracks from the game 's soundtrack , and a number of trailers
X05
X (Xbox show)
Mass Effect (video game)