Use Apocalypse to kill 50 enemy units or structures in a single mission.
Destroy the Odin in “The Reckoning” mission before Mengsk sends it at Raynor on Hard difficulty.
Destroy all Dominion Structures in the “Rendezvous” mission before Naktul’s brood arrives on Hard difficulty.
Kill the Tyrannozor in under 1 minute after it appears in “The Crucible” mission on Hard difficulty.
Complete 20 Heart of the Swarm campaign missions on Brutal difficulty.