Cybernetics Core
The Cybernetics Core is required to build Stalker and Sentry. It is also used to research Air Weapons, Air Armor, Warp Gate and Hallucination.
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Fleet Beacon
The Fleet Beacon is required for building Carrier and Mothership. It is also used to research Flux Vanes and Graviton Catapult.
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Forge
The Forge is required to build Photon Cannon. It is also used to research Ground Weapons, Ground Armor and Plasma Shields.
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Gateway
The Gateway is used for warping in Zealot, Stalker, Sentry, High Templar and Dark Templar. It can be transformed to Warp Gate.
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Nexus
The Nexus is used to produce Probes and Mothership. It also has energy used for Chrono Boost.
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Photon Cannon
The Photon Cannon is a defensive structure able to attack both air and ground targets. It is also a detector.
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Pylon
The Pylon is the Protoss supply-building, providing 8 psi which increases the amount of units the player can have. It also provides a psionic matrix, required for building most buildings and warping in units.
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Robotics Bay
The Robotics Bay is required to build Colossus. It is also used to research Extended Thermal Lance, Gravitic Boosters and Gravitic Drive.
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Robotics Facility
The Robotics Facility is used for warping in Colossus, Observer, Immortal and Warp Prism.
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Templar Archives
The Templar Archives is required to build High Templar. It is also used to research Psionic Storm and Khaydarin Amulet.
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Warp Gate
The Gateway is used for warping in Zealot, Stalker, Sentry, High Templar and Dark Templar. It can be transformed to Gateway.
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