"This unarmed observation drone looks precisely like what it is: an eye in the sky. Deployed to scout unexplored terrain or enemy territory, the observer serves as an invaluable tactical reconnaissance tool for protoss commanders. Heads-up knowledge of enemy movements and logistics often proves to be the difference-maker in an otherwise evenly balanced encounter."

The observer is a small, stealthy robotic protoss reconnaissance unit.


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An observer during the Great War

The observer is a small aerospace drone used to survey space and record events for analysis in protoss archives.[1][2] The observer's primary means of locomotion is a discrete thruster that creates a gravity field, while energy-sheathed "fins" manipulate said field to generate lift and propulsion. Without modifications, the observer can adequately travel from one point to another, but is hard pressed to outrun pursuers—unless outfitted with a set of gravitic boosters.[3] Older observers had a different stabilizer configuring that, while equally effective, gave a more imposing aspect, and some phase-smiths stated this older configuration improved performance.[4]

Observers are fragile craft, and possess very little armor. Their speed and cloaking abilities give them a measure of survivability, but if detected, observers are usually an easy kill unless they withdraw quickly.[5]

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An observer approaches a world

Observers may be equipped for warp space travel and deployed for deep-space exploration.[6] Units used for this purpose often lack defensive systems.[2] They may re-enter real space within planetary atmospheres and transmit data in real-time over interstellar distances. In addition observers may drop navigational beacons as homing devices.[6]

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A Tal'darim observer

By 2506, observers were in use by the Tal'darim.[7] The most cunning ascendants make extensive use of observers to spy on Slayn's enemies, or on each other.[4]

After their activation, the Purifiers especially prized their observers, which soon became a favored construct of Talandar.[8]


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An observer

The complex but sensitive sensor[2] matrix[3] is power intensive,[2] but can collect massive amounts of data in a short amount of time. The critical data gathered by observers has turned the tide of battle numerous times.[4]

The observer may detect cloaked and concealed objects.[2] This includes burrowers and all types of camouflage or stealth systems.[3] It is sophisticated enough to even detect zerg spores within terrans.[9][10] It is comprised of complex arrays of self-focusing lenses, powered by psionic lattices, which allow the observer to analyze the battlefield from its vantage point in the sky.[3] A sensor array upgrade significantly increases the observer's sight range and sensitivity.[5] These properties make the observer a valuable auxiliary on the battlefield.[2]


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The current observer design

Observers intended for combat zones are equipped with a defensive micro-cloaking field. The sensor signature of the drone reduces the field's power requirement and allows the cloak to be maintained for extended periods[2] with little drain to its power core.[11] The field renders them invisible to all but the most advanced of detection technology. Its stealth capabilities are enhanced by its hull, which is fashioned out of a buoyant material that refracts light and masks its diminutive energy signature.[3]

Game UnitEdit


For StarCraft gameplay information see: Observer (StarCraft).
For StarCraft in-game quotations see: StarCraft Observer Quotations.

StarCraft: GhostEdit

StarCraft Ghost Logo2

This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however.
The content may be significantly out of date. Please do not add speculation to this article, and remember to cite a published source for details.

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An observer in Ghost

Observers were to appear in StarCraft: Ghost[12]

StarCraft IIEdit

For StarCraft II gameplay information see: Observer (StarCraft II).
For StarCraft II in-game quotations see: StarCraft II Observer Quotations.

Known ObserversEdit

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An observer



  1. Underwood, Peter, Bill Roper, Chris Metzen and Jeffrey Vaughn. StarCraft (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Observer. Blizzard Entertainment. Official StarCraft II website. Accessed 2007-11-13. Retrieved 2009-01-12
  3. 3.0 3.1 3.2 3.3 3.4 2014-11-20, Observer Science. Blizzard Entertainment, accessed on 2014-11-21
  4. 4.0 4.1 4.2 Blizzard Entertainment. StarCraft II: Legacy of the Void. Collections Tab: Skins. July 19, 2017
  5. 5.0 5.1 Barba, Rick. StarCraft Field Manual (hardcover). Insight Editions, November 17, 2015.
  6. 6.0 6.1 Mesta, Gabriel (July 1, 2001). StarCraft: Shadow of the Xel'Naga. Simon & Schuster (Pocket Star). ISBN 0-671-04149-5.
  7. Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). PC. Mission: Whispers of Oblivion, Evil Awoken (in English). 2015-07-15.
  8. Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). PC. Mission: Salvation. (in English). November 10, 2015
  9. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Safe Haven (in English). 2010-07-27.
  10. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Haven's Fall (in English). 2010-07-27.
  11. Observer, Blizzard Entertainment. Accessed on 2010-11-13
  12. Ghost Units, StarCraft Freak. Accessed on 2011-12-25