Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Destroy 20 units with Yamato blasts in an Unranked or Ranked game.
Win 250 Team Unranked or Ranked games as Terran.
Destroy 20 units with Sniper Rounds in an Unranked or Ranked game.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.