From the back cover:
Captain! Blow those "Word of Blake" fanatics off this planet!
You and your team are going in hard, fast, and first. That scum will soon fear Wolf's Dragoons and your stable of deadly BattleMechs. The tactics are up to you, but don't hesitate to crush them in the rubble of their own buildings.
Dominate your opponent with the most devastatingly lethal war machines ever conceived: BattleMechs.
Buildings, cities, and enemies explode at the twitch of your finger bringing new meaning to the words: "Mass Destruction".
Battle your way through the campaing mode or take on up to 7 of your friends in multiplayer.
The best of the best from around the world will play MechAssault on Xbox Live. Are you ready?"