R.U.S.E.

For this achievement, you must play a 2v2 match with a friend. This achievement, strangely enough, can be gotten in a ranked match.. You must also win for it to unlock. It is probably best for you to unlock while getting the "Best Enemies" achievement because as long as you win the match, you will unlock it. If you don't unlock it, you will just need to do another match with the group and the other team just needs to surrender.