The achievement isn't bad at all. Checkerboard the bunkers and cannons, upgrade the cannons and get economic centers, upgrade the centers and get missile complexes, upgrade the missile complexes, get the planetary shield, and take a nap.
Very fun. 5/5, although I think it could use a little more instruction from the start, e.g. advice on how to disperse structures. It took a fair amount of trial and error.
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