Viper: Its Abduct ability is incredibly useful, a skill that pulls enemies in with its long internal organs. Zergling: The hound of the Swarm, capable of overwhelming numbers. Ultralisk: A powerful giant assault beast, a strain of the Torrasque, armed with Kaiser Blades. Hydralisk: Capable of firing poisonous spines. While its health and armor are low, it offers great cost-efficiency. Brutalisk: Larger than an Ultralisk and a variant of it; it performs aerial attacks when encountering Protoss Colossi.

Zergling: Zerg used for mass offensives. Ultralisk: A giant assault unit armed with Kaiser Blades. Hydralisk: A ranged soldier with a muscle mass of 6,000. Brutalisk: A variant of the Ultralisk that switches to an aerial attack type when facing a Colossus.