Mass Effect 3 ships in just a few short weeks, which means players have some time to do some last-minute housekeeping. If you've already played through the first two installments of the series (and really, you should), now it's time to start thinking about the game's new multiplayer addition. BioWare has just released a new trailer for the game's four-player mode, which should give you plenty of fuel to go on.

The clip shows a variety of races and classes in action, including a human soldier, Quarian engineer, Drell vanguard, Turian sentinal, Asari vanguard, Salarian infiltrator, and Krogan soldier. There's even a nice little cameo from Commander Shepard, as he gives our heroes a quick pep talk. Looking at some of the enemies they're facing on these side missions, our heroes will need all the help they can get. Would it kill you to help out a bit, Shep?

For our hands-on impressions of Mass Effect 3's multiplayer mode, including five reason's why our own Joe Juba thinks it's a good addition, check out our preview. And look for the game March 6 on the PS3, PC, and Xbox 360.