Battle.net

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

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

Complete all the Economy achievements.

Using Auto-Turrets, destroy 20 worker units in an Unranked or Ranked game.

Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.