Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Score the rank of Gold in the “Rush Defense” challenge mission.
Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.
Play enough qualifying games to get placed in a Matchmaking Ranked League.
Complete 5 missions in the Wings of Liberty campaign on Hard difficulty.