Some new details have appeared regarding the upcoming Mass Effect 3 DLC.

First up is the single-player expansion, Leviathan.

“Something lurks in the dark corners of space, something powerful enough to kill a Reaper,” according to BioWare. “Shepard must discover the most closely guarded secret in the galaxy before the Reapers silence it forever. Discover more about the origins of the Reapers as you race across the galaxy to find the Leviathan. Unravel the dark history of the Reaper Race before it is too late.”

The content will let players “explore uncharted systems and new areas on the Citadel” and “interact with brand new characters.” It will also feature the AT-12 Raider shotgun and M-55 Argus assault rifle.

It will cost $10.

Also coming out Tuesday is the Firefight Pack DLC for $2. The content will feature “two powerful new weapons and five bonus weapons” for the single-player.