Survive 15 Infested Horde Attacks in the “Night 2 Die" mode of the “Left 2 Die” scenario.
Complete all the Guide Three achievements.
Score the rank of Gold in all the challenge missions.
Morph 20 Zerglings during the first 255 seconds of a single Melee game.
Destroy 10 cloaked or burrowed units in a single Melee game.