Kill 750 additional Zerg units in the “In Utter Darkness” mission on Normal difficulty.
Destroy the Planetary Fortress in the “Old Soldiers” mission before the nuclear strike on Hard difficulty.
Destroy 50 Protoss structures in “The Dig” mission on Hard difficulty.
Complete 20 Heart of the Swarm campaign missions on Brutal difficulty.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.