Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Use the Artifact no more than once in the “All In” mission on Hard difficulty.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Complete the “Media Blitz” mission on Hard difficulty in less than 20 minutes.
Kill 50 units with a single Penetrator Round in the “Belly of the Beast” mission on Hard difficulty.