Score the rank of Gold in all the challenge missions.
Win 100 Team Unranked or Ranked games as Zerg.
Complete all the Unranked / Ranked Combat achievements.
Win 250 1v1 Unranked or Ranked games as Zerg.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.