BioWare has released a new trailer for Mass Effect 3, offering live action footage from its epic action RPG sequel set to arrive on March 6 (North America) and March 9 (Europe), for PC, Xbox 360 and PS3. An ancient alien race, known only as "Reapers", has launched an all-out invasion leaving nothing but a trail of destruction in their wake. Earth has been taken, the galaxy is on the verge of total annihilation, and you are the only one who can stop them. The price of failure is extinction. A playable demo is now available via Origin, PlayStation Network and Xbox LIVE.