Hold a Xel’Naga Tower for 5 consecutive minutes in a League game.
Destroy 4 Command Centers, Hatcheries, or Nexuses in a single League game.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Destroy 10 cloaked or burrowed units in a single Melee game.
Use Blink to save a Stalker in a Melee game.