Retaliation. The Reapers are not yet done with the advanced species of the Milky Way Galaxy, this time in Mass Effect 3, the fight returns in multiplayer. Mass Effect 3’s Retaliation DLC is the largest, yet entirely free, expansion featuring new (returning enemies) like the Collectors, even Harbinger, new weapons, and new hazards on previous maps. Mass Effect 3: Retaliation will be available for download on October 9th for Xbox LIVE, Origin, and PlayStation Network.