Ghost (StarCraft II)

Ghosts are feared terran covert operatives. They are known for their skill, psionic powers and ability to cloak.

Ghosts take up two slots in a bunker. They have a Hold Fire command, enabling them to hide their presence even when hostile units approach.

Ghosts make good counters against ravens, mutalisks, infestors, and high templar, but are weak against banshees, marauders, zerglings, stalkers, and zealots. They can also be used for mid game mineral line harassment and hydralisk hunting. Their EMP may be used to severely weaken protoss forces.

Ghosts can drop nukes very quickly. When backed up by medivac dropships, they can be moved from one strike zone to another, and heal the cloaked ghost whenever it gets attacked.

Wings of Liberty
In the Wings of Liberty single-player campaign, ghosts are an alternative to spectres. Ghosts are unlocked by playing the mission "Ghost of a Chance", available after Nova offered Raynor's Raiders the technology necessary to train them.

In the Wings of Liberty campaign, ghosts do not have the EMP ability.

Development
Ghosts used to possess these abilities.

Ghosts were also upgradable with the Full-Bore Canister Ammo upgrade in the single player campaign, which gave ghosts +2 damage against light units. Only the upgrade remains within the editor. The icon texture also remains but is unused, as a button for the upgrade was never made.

Quotations

 * See: StarCraft II Ghost Quotations