Survive 5 Infested Horde Attacks in the “Night 2 Die" mode of the “Left 2 Die” scenario.
Destroy 20 units with a single High Templar in a Melee game.
Score the rank of Gold in the “Psionic Assault” challenge mission.
Capture 50 enemy units in a single Vortex in a Melee game.
Use Blink to save a Stalker in a Melee game.