The Ultralisk was brought into the Zerg Swarm after assimilating creatures known as Brontoliths and twisting their genetic code until evolving a giant monster capable of taking extreme punishment. The end result is the largest, toughest ground unit the Zerg can produce from their hatcheries. The Ultralisk serves as a tank, taking fire for less hardy Zerg and dealing damage with its giant unbreakable claws. Due to its sheer size it is unable to burrow underground and takes a long time to produce. It is also unable to attack aerial targets, making it helpless against flying enemies.
The expansion pack, Brood War
, brought the Ultralisk new upgrades like Anabolic Synthesis for faster movement and Chitinous Plating for two extra points of armor that stacked with regular carapace upgrade. The campaign also made use of an Ultralisk known as the Torrasque that appeared in two missions. This advanced Zerg strain has enough hit points and armor to take on a group of Siege Tanks alone and keep on going. Worst of all, the Torrasque could be re-incarnated by a Cerebrate to attack again and again until the Cerebrate was killed.
|Role||Heavy Assault Warrior|
|Resources||200 Minerals, 200 Gas|
|Build Time||60 sec|
| Hit Points||400|
| Armor||1 (add 1 per Carapace Upgrade)|
|Attack (Ground)||20 (add 3 per Melee Upgrade)|
|Produced at|| Hatchery / Hive / Lair|
|Requires|| Ultralisk Cavern|
|Armor||1 (max 6)|
|Requirements|| Ultralisk Cavern|
|Cost||Crystals (300) Gas (200)|