Kill 50 supply worth of units within 15 seconds in a Melee game.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Score the rank of Gold in all the challenge missions.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Locate all 13 weapon pickups in the “Piercing the Shroud” mission on Hard difficulty.