Kill every enemy unit in the “Ghost of a Chance” mission on Hard difficulty.
Complete “The Outlaws” mission on Hard difficulty in less than 10 minutes.
Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Destroy all Zerg structures in "The Devil’s Playground” mission on Normal difficulty.
Score the rank of Gold in the “For the Swarm” challenge mission.