Kill 50 supply worth of units within 15 seconds in a Melee game.
Kill the Brutalisk with lava in "The Devil’s Playground” mission on Normal difficulty.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Complete “The Outlaws” mission on Hard difficulty in less than 10 minutes.
Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.