The ghost is a support unit. Its attack and vitality are unremarkable for its cost. Its weapon deals concussive damage, which makes it ineffective against large units (e.g siege tanks and ultralisks) unless massed, which is usually unfeasible due to its high tech position, cost and build time. Ghosts are a poor choice for large-scale combat due to their expensive cost and fragility to many attacks and spells such as spawn broodling, psionic storm and irradiation. Ghosts are also fairly slow which leaves them vulnerable to units like vultures and mutalisks. Defensively, dark templar make good counters against ghosts, especially when they attempt to use the nuclear missile ability.
The ghost also has its own death sound that is in the game data, however it is not implemented into the gameplay.
The ghost is best used with its abilities, listed below.
The ghost disables enemy mechanical or robotic units. Targets may not attack, move, or use abilities; passive detection and cloaking are disabled. Lockdown may be removed by a medic's restoration ability.
Deploys a nuclear missile at a given nuclear silo; each silo can only hold one nuke. The costs include 8 supply.
To launch the loaded missile, the ghost must direct it; standing uncontrollable and "frozen" for 10-15 seconds until the missile reaches the target. Nuclear launches are announced to all players with the audio and visual message "Nuclear Launch Detected" and the target location is visible to all players by a small flashing red dot. If the ghost is interrupted or the missile is canceled before the process finishes, the nuclear missile is wasted. Without Ocular Implants, the ghost's targeting distance is within the blast radius.
The missile itself has a large blast radius and will usually kill any units and critically damage buildings in one shot. It deals 500 damage or removes two thirds of the victim's total hit points, whichever is greater; thus, two nukes will destroy almost any unit or building, if the building was the one targeted point.