 Hatchery | Cost: 350 
Building Time: 100
Hit Points: 1250
This is the single most important structure for Zerg. First, it produces Creep, on which every structure must be build (except for Exstractor). Also Hatchery produces Larvae, from which all the units are produced.
And, at last, Hatchery is the storage for all gas and crystalls collected. Provides 1 Control Unit.
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 Lair | Cost: 150 100 
Building Time: 100
Hit Points: 1800
Requires: Hatchery, Spawning Pool
When you upgrade Hatchery to Lair, you will be able to build Queen's Nest and Spire. Also you will be able to upgrade Overlords.
Provides 1 Control Unit.
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 Hive | Cost: 200 150 
Building Time: 120
Hit Points: 2500
Requires: Lair, Queen's Nest
This upgrade from Lair allows you to build Ultralisk Cavern, Defiler Mound, Great Spire, Nydus Canal and to make Ultralisks, Defilers, Guardians.
Provides 1 Control Unit
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 Spawning Pool | Cost: 150 
Building Time: 80
Hit Points: 750
Requires: Hatchery
Allows to build Zerglings in your Hatchery. You will be able to build some structures and upgrade your Zerglings.
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 Extractor | Cost: 50 
Building Time: 40
Hit Points: 750
This building must be build on the Vespene Geyser - it doesn't have to be build on the Creep. Inside Drones collect vespene gas and bring it to the Hatchery/Lair/Hive.
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 Creep Colony | Cost: 75 
Building Time: 20
Hit Points: 400
Produces Creep, can evolve into Sunken Colony or Spore Colony.
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 Spore Colony | Cost: 50 
Building Time: 40
Hit Points: 400
Requires: Creep Colony, Spawning Pool
Damage: 15
Shoots only at air units. You can order which unit to attack.
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 Sunken Colony | Cost: 75 
Building Time: 40
Hit Points: 400
Requires: Creep Colony, Evolution Chamber
Damage: 30
This is defensive structure, which uses underground tentacles to hit enemy ground units. You can order which unit to attack.
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 Hydralisk Den | Cost: 100 50 
Building Time: 40
Hit Points: 850
Requires: Spawning Pool
Allows to build and upgrade Hydralisks
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 Evolution Chamber | Cost: 75 
Building Time: 40
Hit Points: 750
Attack and Armor upgrades for all ground units.
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 Queen's Nest | Cost: 150 100 
Building Time: 60
Hit Points: 850
Requires: Lair
Allows to produce and upgrade Queens. Also allows to upgrade Lair to Hive.
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 Defiler Mound | Cost: 100 100 
Building Time: 60
Hit Points: 950
Requires: Hive
Allows to produce and upgrade Defiler.
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 Spire | Cost: 200 150 
Building Time: 80
Hit Points: 600
Requires: Lair
Allows to produce Mutalisks and Scourges and upgrade all air units.
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 Great Spire | Cost: 100 150 
Building Time: 20
Hit Points: 80
Requires: Hive, Spire
This upgrade from regular Spire allows Mutalisks to transform into Guardians.
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 Nydus Canal | Cost: 150 
Building Time: 40
Hit Points: 250
Requires: Hive
It consist of two parts - enter and exit. After you build enterance - you can place exit on any Creep on the map. Nydus Canal allows you to transport your troops instanteneously from one place (enter) to another (exit).
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 Ultralisk Cavern | Cost: 150 200 
Building Time: 60
Hit Points: 600
Requires: Hive
Allows to build Ultralisks.
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 Infested Command Center | Hit Points: 1500
Once you infested a Terran Command Center with your Queen - you'll get an Infested Command Center. It can fly like Terran Command Center. Produces Infested Terrans.
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