A Mass Effect 3 Facebook app has been launched by Microsoft, allowing users to enter competitions and win Mass Effect items.

Start your mission on the Mass Effect 3 Mission Command by merely agreeing to use the app. If enough people take part you'll get a Free Normandy prop for your Xbox LIVE Avatar.

The second mission, set to go live soon, will offer early access to the Mass Effect 3 demo.

A total of 11 missions are planned in the lead up to the game's release on March 9. A free virtual t-shirt will be handed out to those who download the demo.