Destroy 30 units with Infested Terrans in an Unranked or Ranked game.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Use Blink to save a Stalker in a Melee game.