Halo Wars 2

This achievement can be done in a Solo Firefight match or an online game with other players.

While playing Terminus Firefight, you should notice several plots of land around the map: square-shaped plots around the Terminus, HQ, and mini-bases for Turrets, and long, rectangular plots around the perimeter of the map for Barricades. Once you have a steady flow of resources coming in from your Supply Pads and Generators, begin your construction frenzy.

You can choose to tackle these achievements in one of two ways, though the second method is more efficient:

1. Build a few Turrets and Barricades in the immediate vicinity (around the Terminus and two mini-bases), but never upgrade them. When they get destroyed, re-build immediately.
2. Build a few Turrets and Barricades in the immediate vicinity (around the Terminus and two mini-bases). As you amass a fair amount of resources, begin moving your a small Aerial squad (3-4 Hornets/Banshees) around the map, building Barricades whenever you can. For every new mini-base you build, you will unlock 4-7 additional Turret plots.

Once a total of 50 Turrets have been built, "Turret Farmer" will unlock. Similarly, once a total of 50 Barricades have been built, "High Maintenance" will unlock.

NOTE: If playing cooperatively, this achievement is not cumulative across all players. As such, it's recommended to work on these two achievements in a solo match since you won't have to worry about your teammate(s) utilizing their "side(s)" of the map for their own base building.