If you want to expand your great Mass Effect 3 experience, it's just about time…

The Leviathan DLC will arrive on August 28 for the PlayStation 3, Xbox 360 and PC in North America. PS3 players in Europe will have to wait an extra day.

They've provided us with a launch trailer for the extra content and it's well worth watching. Commander Shepard must set out to "discover the most closely guarded secret in the galaxy" before the Reapers destroy it. You'll learn more about the origin of the Reapers as you race to retrieve the Leviathan, and you'll head out to explore "uncharted systems and new areas on the Citadel." There are also a few new characters and weapons, too.