The hostile environment suit, otherwise known as a skinsuit or stealth suit, is the standard issue combat gear for terran ghosts, though was originally developed for miners. It is a polymer light-refracting nano-fiber suit covering the body along with a helmet or headpiece, and is among the most advanced technology ever conceived by humanity.
Spectres are equipped with a similar suit to the one worn by ghosts. However, their version is thicker and possesses a tighter weave, giving them a greater boost to their strength and agility, as well as a more advanced HUD and visor.
The hostile environment suit was originally designed for miners working in high-temperature environments and on cold planets. Its temperature regulation system could shield the wearer from heat detection equipment.
The form-fitting suit is interwoven with an advanced circuitry system that covers the entire body apart from the head, which could interfere with the ghost's psionic powers. In addition to an adjustable temperature setting, it is laced with a form of psi-sensitive artificial muscle fiber which augments their natural physical strength, speed, and endurance, dispensing the need for bulky power armor. The suit helps ghosts channel their psionic energy.
The helmet acts as a chemical agent mask and the suit provides NBC (nuclear/biological/chemical) shielding by absorbing dangerous elements and rendering them inert. The suit itself is designed to withstand the cold vacuum of space.
Most suits are black, blue, and/or gray in color.
Perhaps the most well known function of the suit is its cloaking ability. Though older models lack it, many ghost suits feature a personal cloaking device, allowing the ghost to render him/herself invisible. The device works in conjunction with the suit, as its outermost layer contains synthetic cells that, under psionic stiumuli, refract light to synergize with the device, and making the user invisible to the naked eye. The amount of time this is able to be used is limited by the amount of energy available, though can be increased through the installation of a Moebius Reactor. The cloaking system would shut down upon the user's death in earlier suits although this has become redundant with new models, where, should the ghost die, the suit automatically degrades itself and the wearer to prevent the technology from falling into enemy hands. The stealth abilities were, and perhaps still are, aided by coolant systems woven into its lining, rendering its user invisible to infrared sensors. Because adhesive substances can prevent the use of cloaking, the suit can vibrate to shake them off.
By the Second Great War, there were at least three new models of the ghost suit: the Crius and the Nyx (utilized by ghosts and spectres respectively) had psi-augmenters allowing cloaking to be held indefinitely and freeing up the agent's psionic energy for other tasks. The Crius model was of Dominion design, and was regarded as "the ultimate hostile environment suit." However, due to its immense cost, few were ever deployed. The tactical stealth suit allows ghost agents to remain cloaked indefinitely.
The suit possesses a helmet/eyepiece (or ocular implants as the case may be). The helmet shares the rest of its functions with the smaller headpiece, which include a comm system and infrared vision. A HUD system is also present, capable of showing a map display in the left-hand corner and a zoom function for increased sight range and target acquisition. The helmet visor also enhances sight, and includes an automated targeting system that calculates atmospheric pressure and wind shear. Passive and active scans can be carried out, displayed on a wrist unit. Such scans can designate affiliation of a target, alert a ghost to hazardous terrain (e.g. fissures), scan chemical substances and pick up living and/or moving targets.
This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however.
The suit provides limited protection against small arms fire and full life support.
The helmet features a psionic "heat vision" mode which allows the ghost to see through walls. At least in later models, the suit's HUD provides the ghost information on his/her health status, the amount of psionic energy available, a stealth meter (an indication as to how exposed the ghost is to being seen) and a weapon meter, informing the ghost of how much ammunition is available for his/her equipped weapon.
- Apollo infantry suit
- Crius stealthsuit
- Eidolon suit
- Nyx-class cloaking module
- Phase reactor suit
- Tactical stealth suit
- Turbojet jumpsuit
A civilian suit named the hostile environment suit also exists, used when exploring areas inhospitable to human life. It appears to be different from the ghost variant.