Mass Effect 3: Leviathan DLC Preview

Kotaku is offering a short hands-on preview for Mass Effect 3's upcoming Leviathan DLC, which includes a rather handy bulletpoint list provided by a BioWare developer, which I'm going to quote together with a snippet of the actual experience:
Vital stats, according to Clifford:

'¢ Leviathan will be 2 to 3 hours long, probably closer to 3 hours. Clifford said they were shooting for about a Lair of the Shadow Broker depth.
'¢ The story will take place in the middle of the Mass Effect 3 story, with no specific place in the storyline.
'¢ There are 3 main combat missions, which will take place all over the Mass Effect universe.
'¢ There will be new weapons, some of which were previously pre-order bonuses.
'¢ The story begins on the Citadel, but goes beyond that. (All the way to the bottom of the ocean. Well, an ocean.)
'¢ It will be out on all platforms simultaneously.
'¢ It will be out this summer, after the Firefight weapon pack, which comes out August 7 Th..
'¢ It will cost $9.99.

...

Cortez and Shepard realized that there was a combat mech on the ship that could go underwater, but we'd have to power up the doors blocking the way to it. So, I put a battery pack on my back and fought my way across the deck to a charging station, where I hit a button to begin charging up the door. Clifford said that multiplayer has let the folks at BioWare had learned a lot about making combat interesting by watching the Mass Effect 3 multiplayer, and that they were much more interested in creating objectives like this on the battlefield.

I fought my way back to Cortez to get another battery, then back to the charging station, then one more time, before the mech was finally available. Shepard hopped in, and the crew was overrun with enemies. Then came the humorous mission objective:

KILL ALL ENEMIES

Ha. So I completed that objective with gusto, fighting from a first-person perspective like the mech sequence in the main game. After that, I went and checked back in with Cortez, before we came to the conclusion that it was time to take this mech underwater.