BioWare has released a new video for Mass Effect 3, its epic action RPG sequel set to arrive on March 6 (North America) and March 9 (Europe), for PC, Xbox 360 and PS3. In Mass Effect 3, an ancient alien race known only as "Reapers", has launched an all-out invasion of the galaxy, 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. You, as Commander Shepard, must lead the counter assault to take it back.