Kill the Brutalisk with lava in "The Devil’s Playground” mission on Normal difficulty.
Destroy 40 units with a single unit in an Unranked or Ranked game.
Score the rank of Gold in the “Tactical Command” challenge mission.
Save 3 Colonist Outposts in the “Safe Haven” mission on Normal difficulty.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.