Destroy 20 units with Sniper Rounds in an Unranked or Ranked game.
Complete all the Unranked / Ranked Combat achievements.
Kill 50 supply worth of units within 15 seconds in a Melee game.
Destroy 40 units with a single unit in an Unranked or Ranked game.
While playing as Zerg, warp in a Zealot in a Melee game.