A walkthrough of the Mass Effect 3 demo

The Mass Effect 3 downloadable demo isn't due out until February 14, but ExpertZone members (retail employees registered at Microsoft's retail traning website) have early access to the Xbox LIVE version.

YouTube user NinjaDancer recorded two lengthy videos of the demo, walking us through the trial in full. The demo sees Commander Shepard head to Earth to combat an unknown alien invasion. The first video is an 11 minute-long opening cutscene. To avoid spoilers, we suggest skipping the first clip, and moving directly to the second.

Mass Effect 3 is due for Xbox 360, PlayStation 3, and PC on March 6, 2012.