:
you oughta save three colonist encampments, including the one in your base.
Some simple calculations lead to the conclusion that you might sacrifice two.
Place two or so Bunkers to protect the base and fill them up with Marauders and cheap Marines.
Such a set should be quite enough, however you will probably have to face some hard moments.
you’ve got the option to increase the defence later on, once you’re rich enough.
Destroy the two Prisms which power the Cannons, defending from a pair of Phoenixes beforehand.
Land on the nearby cliff[1]and destroy the headquarters from uphigh, while in assault mode.
Repeat the process with the middle base[2], looking out for the Colossus and Stalkers.
The lowest encampment has the strongest defence, with an Archon, Carrier and a Void Ray.
take a stab at precisely eliminate the defendants, while avoiding an open fight.
Keep on adding new ships to your squad, while investing in upgrades in the Armory.
Return to base from time to time to repair your machines (or keep SCVs somewhere behind).
My Precious:
The above description pretty much fits this achievement as well.
The key to victory is the first phase of the mission.
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