Score the rank of Silver in the “For the Swarm” challenge mission.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Win 5 Team Matchmaking Unranked or Ranked games.
Score the rank of Gold in the “Tactical Command” challenge mission.