Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Score the rank of Gold in the “For the Swarm” challenge mission.
Destroy 30 units with Infested Terrans in an Unranked or Ranked game.
Win 100 1v1 Unranked or Ranked games as Zerg.