Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.
Complete the Wings of Liberty campaign under 8 hours of total played mission time on Normal difficulty.
Beat the Terra-tron on the Lost Viking arcade machine.
Destroy 10 cloaked or burrowed units in a single Melee game.
Destroy 40 units with a single unit in an Unranked or Ranked game.