Battle.net

Kill 50 supply worth of units within 15 seconds in a Melee game.

Destroy 40 units with a single unit in an Unranked or Ranked game.

Build a Factory during the first 270 seconds of a Melee game.

Cancel construction of a structure that is being destroyed by an opponent in a Melee game.

Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.