Section 8

The three dlc maps can be done in a Ranked match or Private match. Start a private match and invite a friend. Make sure you win the match by doing the objectives that come up, taking over the bases, and/or just killing your friend. If you are doing this with a friend then you should win rather easily. Chances are you can get this with bots as well, since you can do it in a Private match.

Personally, I had an extra copy of the game, so I did it with myself. My dummy account got kicked out of the match for going idle, but I invited him back in, won the match, and still got the achievement.