Win 100 1v1 Unranked or Ranked games as Zerg.
Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Score the rank of Gold in the “Infestation” challenge mission.