Citadel, the final single-player expansion to Mass Effect 3 has been announced by BioWare, as well as the final multiplayer expansion called Reckoning.
Mass Effect: Citadel will be released on March 5 for the PS3, Xbox 360 and PC and will be priced at $14.99 or 1200 Microsoft Points.
The official announcement speaks of the DLC:
When a sinister conspiracy targets Commander Shepard, you and your team must uncover the truth, through battles and intrigue that range from the glamour of the Citadel’s Wards to the top-secret Council Archives. Uncover the truth and fight alongside your squad – as well as the cast from the original Mass Effect and Mass Effect 2.
Reckoning is going to be a free multiplayer expansion and will be released on February 26. It will bring new weapons, equipment and maps to the table.
The whole expansion is said to be more than 2GB and hence, will require you to download it in two parts.