Purchase all Mercenary contracts.
Destroy 4 Command Centers, Hatcheries, or Nexuses in an Unranked or Ranked game.
Load a Dropship with a unit that is under attack in an Unranked or Ranked game.
Locate all 13 weapon pickups in the “Piercing the Shroud” mission on Hard difficulty.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.