The BioWare Blog announces the free Earth DLC for Mass Effect 3 is now available, offering this trailer showing off what this adds to the action/RPG sequel. Here's word:

The fighting is fiercest when it’s your home at stake! Mass Effect 3: Earth adds mods, gear, and new maps for Rio, Vancouver, and London. It features 3 new weapons: Piranha assault shotgun, Acolyte pistol, and Typhoon assault rifle. Six new human N7 classes are also available: Destroyer Soldier, Paladin Sentinel, Demolisher Engineer, Slayer Vanguard, Shadow Infiltrator, and Fury Adept! Each come complete with new and powerful abilities and melee attacks.