Moebius Factor has another bugged achievement. This one is “Hard Core” which is one of the original three achievements. It’s the one that requires finishing the mission before Kerrigan destroys 6 buildings on Hard difficulty.
Looking at the achievement trigger, it seems that the only criteria for receiving the achievement is to build anything besides a Merc, SCV and Medivac (and to win). That’s it! Build a single marine, for example, and the achievement is awarded. In other words, there’s nothing in the trigger about the number of buildings that Kerrigan destroyed:
I tested this. I built a big army of many unit types, I intentionally let Kerrigan destroy more than six buildings, then I finished the mission. As I suspected, I was awarded the Hard Core achievement despite Kerrigan destroying more than 6 buildings:
