Mass Effect 3: Earth (2012)

The Mass Effect 3: Earth DLC is a free multiplayer expansion for the game that added new maps, characters, weapons, and a higher difficulty level to the game's co-op multiplayer mode. Players can select from six new human N7 classes, use three new weapons, play on maps located on Earth (Firebase Rio, Vancouver, and London), and face challenges on the new "Platinum" difficulty level.