All achievements on “Hard Difficulty” for mission 3, on the Wings of Liberty Campaign, in StarCraft II.
Even though it is only mission three, it is probably the hardest mission in terms of achievements, in the Wings of Liberty Campaign. There are very few posts on the internet of a game on Brutal being awarded all 3 achievements. I did it on Hard.
I have completed this mission on Brutal – even killed 4 hatcheries
If you can wipe out all 8 hatcheries on normal there is a special “Feat of Strength” award.