Battle.net

Expand during the first 225 seconds of a Melee game.

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

Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.

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

Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.