Mass Effect 3 will have a cooperative multiplayer element. The mode is called "Galaxy at War," and what players team up and do within it will actually affect the outcome of the single player campaign. Completing the missions will supposedly give players higher odds of attaining a perfect ending for the game.

It's not mandatory, but it looks like skipping the mutliplayer mode entirely will affect your single player experience. I'm not sure how to feel about that.

You'll play brand new characters here, as no one from the campaign is playable. Although, as the trailer above shows, at least Commander Shepard will make a cameo in the multiplayer mode.

BioWare's Patrick Weekes, Senior Writer for Mass Effect 3, wrote up a blog post to accompany the multiplayer trailer. In it, he takes time to lay out a step by step gameplan for playing with a Vanguard on your team. Having one in your party, according to Weekes, dramatically changes the way battle scenarios should be played.

It's an interesting read that sheds some light on the tactical nature of the multiplayer experience in Mass Effect 3.

You'll be able to try the multiplayer side of this game when the title's demo launches on February 14th. Mass Effect 3 will officially drop for the Xbox 360, PlayStation 3 and PC platforms on March 6th, 2012.