Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Destroy 40 units with a single unit in an Unranked or Ranked game.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Train 10 Marines during the first 320 seconds of a single Melee game.