Mass Effect 3: Omega

Omega is a downloadable content (DLC) pack for Mass Effect 3. It is built like a side quest that can be accessed from the main game when Commander Shepard receives a message from Aria T'Loak, the asari Pirate Queen. It appears that the Omega, a space station serving as a safe haven for criminals and dissidents and ruled de facto by Aria, has been captured by Oleg Petrovsky, one of the top generals working for the human extremist organization Cerberus. Shepard travels to Omega and attempts to help Aria to re-conquer her domain.

This expansion pack adds five new missions to the main game, as well as two temporary companions: Aria herself and the mercenary Nyreen Kandros, the first female turian to appear in a Mass Effect game. It also adds two new weapons, five weapon mods, four war assets, and two bonus powers.