Complete the “Outbreak” mission on Normal difficulty before the 5th night.
Kill 250 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Complete all mission objectives in “The Gates of Hell” mission.
Kill 150 Zerg units with the Artifact in the “All In” mission on Normal difficulty.
Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.