Just as with the last DLC, there are 3 achievements tied to each map, on which you need to play every core game mode:
Attrition
Capture The Flag
Hardpoint Domination
Last Titan Standing
Pilot Hunter
You do not need to win the match on each map, losing still counts towards the achievement. While every once and awhile the dlc maps will pop up in core playlists, it is much easier to play the Frontier's Edge Variety Pack playlist to unlock this achievement.