EA announces this is an N7 Challenge weekend for Mass Effect 3, offering the chance to earn rewards in the action/RPG sequel. Here's what's happening in the Windows and Xbox 360 editions of the game between now and Monday at 8:00 am EDT:

Operation Goliath

• Any player who is part of a squad that beats the Reaper faction on Silver difficulty or better will unlock one Commendation Pack. This means that at least one member of the squad must be extracted at the end of the mission – this will earn all squad members the reward. Each player can earn a maximum of one pack and each pack contains a random N7 Arsenal Weapon. Originally only available as single-player weapons via the N7 Collector’s Edition, these multiplayer variants will be exceptionally rare and are NOT obtainable through regular purchasable Reinforcement Packs. The Commendation Packs will contain one of the following guns at random: (1) N7 Crusader Shotgun, (2) N7 Eagle Pistol, (3) N7 Hurricane SMG and (4) N7 Valiant Sniper Rifle.
• Destroy as many brutes as possible – if the multiplayer community kills a combined 1 MILLION brutes within the hours of the challenge, ALL players will receive a Victory Pack as a reward.