After watching this two-part walkthrough, you'll be able to master the Atacama Desert map on the Onslaught Co-Op DLC mode for Battlefield: Bad Company 2. And we're not kidding, because this video guide is played on Hardcore Difficulty, the toughest of the difficulties. It might be a good idea for you to complete Hardcore Difficulty with a full squad of 4 players: 2 Engineers, 1 Assault, and 1 Medic.
* This guide is for the PlayStation 3 (PS3), but could also be used for the Xbox 360.
Check out some other maps on Onslaught Co-Op mode, Hardcore Difficulty: