Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Kill a Stank before it kills anything on Hard difficulty.
Destroy all Protoss structures in the “Welcome to the Jungle” mission on Normal difficulty.
Score the rank of Gold in all the challenge missions.
Complete round 9 in “StarCraft Master” in under 45 seconds.