Called "Operation Silencer," this latest Mass Effect 3 multiplayer event challenges players to take down 3 million banshees between the dates of May 11, and May 14 (Friday to Monday.)
If the community can rally to take down that colossal number then everyone will be rewarded with a Victory Pack, though what's inside was not specified.
There's also a secondary goal with its own potential reward. Bioware is also offering a "Commendation Pack" to any squad that manages a full extraction against any enemy on Gold difficulty.
They also took the opportunity to send over a few statistics about multiplayer so far in Mass Effect 3. Among them are the interesting tidbits that 22.84 million multiplayer matches have been played since the game went online. Of which, only 10.5 million were successful extractions, and only 3.5% of successful extractions were on Gold difficulty.
15 Points/ Bronze TrophyKill an enemy with each weapon type including special weapons.The gun types that you’ll need to kill enemies with are Pistol, Shotgun, Submachine gun, Assault Rifle, Sniper Rifle, and Light Machine gun. These can be bought as well as found from the Spec-ops enemies throughout the campaign. The two special weapons are the Grenade Launcher and the Flamethrower. Each can be found throughout the campaign in certain special weapon cases. Among other places the two weapons can be found, the flamethrower can be found in a case atop the walkway, directly above and to the right from where you enter the very first room. The grenade launcher can be found in the very last room of the game while fighting against the “boss.”15 Points/ Bronze TrophyAttempt "The Rescue" and survive.During the last chapter, you will be given the choice of defending or hunting Leon. If you choose Defend and successfully complete the mission, you will get this.30 Points/ Bronze TrophyKill 13 zombified teammates.During the campaign, companions can get infected and will have a purple biohazard symbol appear beside their name. When their health depletes, they will turn into a zombie. When you see the symbol appear, wait for the transformation to happen and then take the newly zombified person down. Do it 12 more times and this will be all yours.
20 Points/ Bronze TrophyComplete the fifth mission of the USS campaign.This is part of the single player campaign and will be received from completing Mission Four: Gone Rogue.20 Points/ Bronze TrophyKill 5 enemies by causing Blood Frenzy in a single campaign game or multiplayer match.When you shoot a Spec Op soldier, you will sometimes cause them to bleed by shooting them with non-lethal shots, preferably to the legs or arms- anywhere but head and chest shots. When you do, there is a good chance they will start to bleed out and attract zombies. When they do, you will see a red mist appear off them and the zombies will go directly after them. Do that five times and this will be yours. You can only do it in places where there are Spec Ops and zombies together, so Mission Two and Mission 4 are good places.10 Points/ Bronze Trophy50 Versus opponents killed lifetimeWhen playing versus mode against online real players, take down 50 of them over time, and this is your reward. Just keep playing versus mode and unless you are completely terrible at shooting, you will get this. If you feel like taking the easy way, you can load a private match will friends and kill them 50 times to get it.http://www.gamesradar.com/resident-evil-operation-raccoon-city-achievements-and-trophies-guide/5 Points/ Bronze TrophyKill an infected teammate with a headshot before they become a zombie in any mode.When a teammate gets infected, purple biohazard symbol will appear beside their name. When you see this above a companion, simply shoot them in the head to kill them before they turn into a zombie. No worries though, even without their head you can revive them immediately, because that makes total sense.15 Points/ Bronze TrophyPurchase 15 weapons.Simply purchase 15 weapons through the character selection screen before each round or mission starts. Weapons bought will also transfer over to other characters.
10 Points/ Bronze Trophy13 Parasite Zombies killed lifetime Points/ TrophyDuring the Fourth Mission: Gone Rogue, you will enter an Umbrella Laboratory to extract a parasite from a Tyrant. While you are in the lab, there will be a few parasites kicking around that will latch onto zombies. Extract the parasite from the Tyrant and then go back up the stairs to the second floor. Now parasites and zombies will continually spawn when you reach each end as you near them. Simply kill them as they come and grab ammo as needed from the available depots located nearby.20 Points/ Bronze TrophyComplete the second mission of the USS campaign.This is part of the single player campaign and will be received from completing Mission Two: Corruption.