Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Using Auto-Turrets, destroy 20 worker units in an Unranked or Ranked game.
Complete 20 missions in the Wings of Liberty campaign on Brutal difficulty.
Destroy 30 units with Infested Terrans in an Unranked or Ranked game.
While playing as Zerg, warp in a Zealot in a Melee game.