R.U.S.E.

This is a Single player achievement and cannot be missed. You will unlock this achievement after completing mission 21 of the campaign. The achievement unlocks on all difficulties so if you're having troubles play on the easiest difficulty.

At last there is a complete video guide made by Uimasterskill which can be found on this link:
http://www.youtube.com/playlist?list=PLA122B0FFE3206BE0

(any RUSE single player mission can be found on this link)

This video is the start of mission 21: (1/2)