Omega is the latest Mass Effect 3 DLC to come out from Bioware. If you played the game upon its release (before the DLC releases), you find out from Aria, the iron fisted ruler of Omega, that she has been ousted by Cerberus. Before Shepard leaves Aria to lick her wounds, she vows to take back Omega. And take it back she does with a vengeance. Aria enlists Shepard’s help to infiltrate Omega and to enact her revenge on Cerberus, specifically on the person responsible for ousting her in the first place––General Oleg Petrovsky, a top-ranking Cerberus agent.