Destroy 40 units with a single unit in an Unranked or Ranked game.
Score the rank of Gold in all the challenge missions.
Win a Free-For-All Multiplayer Custom Game against 7 Elite A.I. opponents.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Destroy 10 cloaked or burrowed units in a single Melee game.