
The fight to save the galaxy continues as an old enemy makes a dramatic return in the biggest downloadable content pack yet for Mass Effect 3 multiplayer! Mass Effect 3: Retaliation raises the stakes by introducing dangerous environmental threats to existing maps and brings the feared Collectors into the fray as a brand-new enemy faction in multiplayer. Also included in the Mass Effect 3: Retaliation expansion is an innovative challenge system that rewards players for their achievements in multiplayer. This new addition allows players to monitor and compare their progress across a variety of multiplayer challenges. The full package includes: New “Hazard” Versions of Existing Maps: Battle across six maps as Firebases rotate through deadly hazards and traps. Survive waves of Acid, Lightning, Meltdowns, Sandstorms, Swarms, and Whiteouts! New Lethal Enemy Faction: Get ready to confront the Collector Praetorian, Scion, Abomination, Trooper, and Captain. Rumors also suggest Cerberus has recruited the Dragoon, while the Geth are unleashing new Drones onto the battlefield. New Unlockable Weapons: The Collectors have introduced devastating new armaments: the Collector Assault Rifle, Sub-Machine Gun, and Sniper Rifle. Earn these weapons and new gear enhancements to strengthen your arsenal. New Class Kits to Unlock: Several new characters have joined the battle against this fresh threat, including the Turian Havoc Soldier and Turian Ghost Infiltrator. More class kits will be added in the weeks ahead. New Powerful Upgrades: Customize your weapons with three new ammo modifications and reinforce your equipment with five distinct upgrades to take on even the most formidable enemies. New Multiplayer Challenge Feature: Think you're the top soldier in the Alliance? Track your achievements in the new “Challenges” system. Complete a range of multiplayer missions and feats to unlock titles and banners to showcase in-game, and then measure your success against your friends.
| PC | October 9, 2012 |
| X360 | October 9, 2012 |
| PS3 | October 9, 2012 |