Kill 15 enemy units with a single Nuke in an Unranked or Ranked game.
Win 5 1v1 Unranked or Ranked games in a row.
Kill a Stank before it kills anything on Hard difficulty.
Kill the Brutalisk with lava in "The Devil’s Playground” mission on Normal difficulty.
While playing as Zerg, warp in a Zealot in a Melee game.