This article is about the protoss structure. For the xel'naga-crafted observation structure, see xel'naga tower.

The observatory is a protoss structure. It is required for the warping and upgrading of observers.

The protoss consider history to be of vital importance, and even during the Aeon of Strife scribes recorded the wars and their heroes for future reference. The observatory is a modern refinement of the ancient library, where data gathered by observers is recorded and cataloged.[1]

Game Structure


Research Upgrades

GravBoost Observer Icon SC1
Gravitic Boosters
Purchased from Observatory
Hotkey G
Cost 150 Minerals Terran SC1 150 Gas Terran SC1 133Time SC2 Game1
SensorArray Icon SC1
Sensor Array
Purchased from Observatory
Hotkey S
Cost 150 Minerals Terran SC1 150 Gas Terran SC1 133Time SC2 Game1

Building Upgrades

  • +1 armor bonus to shields per level for all units and structures.
Purchased from Forge
Hotkey S
Level 1
Cost 200 Minerals Terran SC1 200 Gas Terran SC1 266Time SC2 Game1
Level 2
Cost 300 Minerals Terran SC1 300 Gas Terran SC1 298Time SC2 Game1
Required Cybernetics core
Level 3
Cost 400 Minerals Terran SC1 400 Gas Terran SC1 330Time SC2 Game1
Required Cybernetics core


During the StarCraft alpha, the observatory was known as the "beacon."[2]

StarCraft II

The following section contains information from a previous version of StarCraft II which is no longer valid.

Observatory SC2 DevRend1

The observatory.

The observatory was a building in early builds of StarCraft II. It was canceled as of September 2008.[3]

The observatory was used to enable the robotics facility to warp in observers and was also the center for their upgrades and upgrades for the phase prism.[4]

It appears to have used the same model as the null circuit.


  1. Underwood, Peter, Bill Roper, Chris Metzen and Jeffrey Vaughn. StarCraft (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  2. Renders, accessed on 2011-07-20
  3. Karune. 2008-09-05. StarCraft II Q&A - Batch 44. StarCraft II General Discussion Forum. Accessed 2008-09-05.
  4. StarCraft Legacy staff. 2009-04-04. WWI 08 Coverage - Protoss Units. StarCraft Legacy. Accessed 2009-06-22.

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