Win 5 1v1 Unranked or Ranked games in a row.
Complete all the Melee Combat achievements.
Dodge a Raven Seeker Missile in a Melee game.
Destroy an enemy Command Center, Hatchery, or Nexus while it is under construction in an Unranked or Ranked game.
Use Blink to save a Stalker in a Melee game.