Complete all the Outmatched achievements.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Destroy all Protoss structures in the “Welcome to the Jungle” mission on Normal difficulty.
Destroy 6 units with a single Seeker Missile in an Unranked or Ranked game.