Complete all the Unranked / Ranked Combat achievements.
Finish a Qualification Round with an undefeated record.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Destroy all Protoss structures in the “Welcome to the Jungle” mission on Normal difficulty.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.