Battle.net

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

Destroy 40 units with a single unit in a single League game.

Score the rank of Silver in the “Covert Ops” challenge mission.

Destroy all Protoss structures in the “Welcome to the Jungle” mission on Normal difficulty.

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