Kill a Stank before it kills anything on Hard difficulty.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Win 50 Team Unranked or Ranked games as Zerg.
Destroy all Protoss structures in the “Welcome to the Jungle” mission on Normal difficulty.
Destroy the Odin in “The Reckoning” mission before Mengsk sends it at Raynor on Hard difficulty.