The time has come, as it's only appropriate that we have a Mass Effect 3 multiplayer difficulty on scale with a true final attack on Earth. Yes, the Earth multiplayer DLC is now available, replete with 3 weapons, 6 classes and the afore mentioned Platinum difficulty. Coinciding with the DLC's launch, BioWare has also released a trailer -- a very well-produced trailer -- that should get everyone excited.
Our own Lydia Sung was able to try the new difficulty out at SDCC, if you're interested in reading some early impressions. In her own words Plat difficulty, "will tear you a new one." Personally, it has been a while since I tried multiplayer out, but I might just go back to see if my skills hold up. With the right team even Gold was beginning to get stale there for a while.
If you're interested in all of the new content being included in the DLC, weapons, maps, classes, we have a write-up of that, too. Otherwise, check out the trailer, download the DLC, and start busting heads. The Mass Effect 3 Earth multiplayer DLC is now available for PC, Xbox 360 and PlayStation 3 (tomorrow for European PS3 players).
"Earth" Multiplayer DLC - YouTube