Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Complete all 30 rounds in “StarCraft Master".
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.