This added in a bunch of extra content into the multiplayer PVE mode in Mass Effect 3. The Collectors were added in as a new faction to fight, and Hazard maps were added in to change up how the current maps worked. There are also some additional new weapons and classes to unlock and use in the game. Pretty good update in my opinion, but some of the hazard stuff is kinda BS.

The new enemies and player characters added in this update add a ton to the game, but the Hazard maps suck a lot of the joy out anytime they show up in a random map lobby.