Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Complete the “Echoes of the Future” mission with Zeratul killing 50 Zerg units on Normal difficulty.
Load a Dropship with a unit that is under attack in an Unranked or Ranked game.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Use Blink to save a Stalker in a Melee game.