DICE product manager Kevin O'Leary is featured in a Battlefield: Bad Company 2 - Vietnam video below, giving you a walkthrough of the Onslaught demo on the floor of TGS.
We have it for you below, courtesy of Gamespot.
The developer has "backdated" the armor, weapons, and vehicles to the Vietnam era, but said it still contains the "same multiplayer experience" players will be used to from the BFBC series.
Revealed during its E3 press event, BFBC2’s first multiplayer Expansion Pack will allow players to fight as either a U.S. Marine or a North Vietnamese solider.
The expansion will be made available on PC, PS3 and Xbox 360 this winter.
Enjoy the video.