BioWare has released a new video with the first look at the cooperative multiplayer component to its role-playing epic Mass Effect 3.

The four-person co-op missions have players working together to free key locations as part of Commander Shepard's larger battle against alien enemies the Reapers.

Players can choose between several races -- including human, Turian, Asari and Krogan -- and classes such as soldier, engineer and vanguard.

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The game launches March 6 for PC, Playstation 3 and Xbox 360.

PREVIEW: Hands-on with Kinect-enabled 'Mass Effect 3'

See photos of: Microsoft Xbox, PlayStation, Electronic Arts Inc., BioWare, Mass Effect