Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.