The zerg evolution chamber is the result of the Overmind's view that complacency is the road to defeat, causing it to spur zerg evolution constantly. The evolution chamber provides a testing ground for the genetic code of lesser breeds, helping to increase the offensive and defensive capabilities of the zerg ground-based breeds. It is also required in order for a creep colony to mutate into a spore colony.^[1]

The evolution chamber, in the form of the evolution pit, is also found within leviathans.^[2]

Contents 1 Game Structure 1.1 StarCraft 1.1.1 Researched Upgrades 1.1.2 Development 1.2 StarCraft II 1.2.1 Researched Upgrades 1.2.2 Heart of the Swarm 1.2.3 Development 2 References

Game StructureEdit

StarCraftEdit

Evolution Chamber
Structure
Race	Zerg
Production
Minerals	75
Build time	40
Evolves from	Drone
Requires	Hatchery
Protection
Hit points	750
Armor	1
Function
Allows	Spore colony
Research	Melee Attacks Missile Attacks Carapace

Researched UpgradesEdit

Melee Attacks
Evolved at	Evolution chamber
Hotkey	M
Properties
Level Level 1 Level 2 Level 3 Minerals 100 150 200 Gas 100 150 200 Evolution time 266 298 330 Required Hatchery Lair Hive
Notes
+1 bonus per attack per level for broodlings and zerglings. +3 bonus per attack per level for ultralisks.

Missile Attacks
Evolved at	Evolution chamber
Hotkey	A
Properties
Level Level 1 Level 2 Level 3 Minerals 100 150 200 Gas 100 150 200 Evolution time 266 298 330 Required Hatchery Lair Hive
Notes
+1 bonus to attack damage per level for hydralisks +2 bonus to attack damage per level for lurkers

Carapace
Evolved at	Evolution chamber
Hotkey	C
Properties
Level Level 1 Level 2 Level 3 Minerals 150 225 300 Gas 150 225 300 Evolution time 266 298 330 Required Lair Hive
Notes
+1 bonus to armor per level for broodlings, defilers, drones, hydralisks, infested terrans, larvae, ultralisks, and zerglings.

DevelopmentEdit

Unlike its alpha appearance, the evolution chamber's form in the StarCraft beta was mostly identical to its end version, though had a distinctly more withered appearance.^[3]

StarCraft IIEdit

Evolution Chamber
Structure
Race	Zerg
Properties
Broodlings produced	6
Production
Minerals	75
Build time	35
Evolves from	Drone
Requires	Hatchery
Hotkey	V
Protection
Hit points	750
Armor	1
Type	Structure Biological
Armor type	Armored
Function
Allows	Spore crawler
Research	See below

The evolution chamber appears in StarCraft II. When attacked and destroyed it appears to have a basic skeleton structure that falls out; containing a head, spinal column, and ribs.

Researched UpgradesEdit

Melee Attacks
Evolved at	Evolution chamber
Hotkey	M
Properties
Level Level 1 Level 2 Level 3 Minerals 100 150 200 Gas 100 150 200 Evolution time 160 190 220 Required Lair Hive
Notes
Increases damage per level for zerglings, banelings, broodlings and ultralisks.
Edit

Missile Attacks
Evolved at	Evolution chamber
Hotkey	A
Properties
Level Level 1 Level 2 Level 3 Minerals 100 150 200 Gas 100 150 200 Evolution time 160 190 220 Required Lair Hive
Notes
Attack bonus for queens and zerg ground ranged units.
Edit

Carapace
Evolved at	Evolution chamber
Hotkey	C
Properties
Level Level 1 Level 2 Level 3 Minerals 150 225 300 Gas 150 225 300 Evolution time 160 190 220 Required Lair Hive
Notes
+1 bonus to armor per level for zerg ground units.
Edit

Heart of the SwarmEdit

Main article: Evolution pit

The evolution chamber, in the form of an evolution pit, appears as its own environment in Heart of the Swarm. Zerg evolution is driven here in regards to upgrades and unit choices.^[2]

DevelopmentEdit

Main article: Evolution chamber/Development

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

The evolution chamber has undergone numerous changes during the development of StarCraft II.

ReferencesEdit

Zerg Units and Structures of StarCraft/Brood War
Ground units	Larva · Drone · Zergling · Hydralisk · Lurker(BW) · Defiler · Ultralisk
Air units	Overlord · Mutalisk · Guardian · Scourge · Queen • Devourer(BW)
Infestation units	Broodling · Infested terran
Transition units	Egg · Lurker egg · Cocoon
Basic buildings	Hatchery · Extractor · Evolution chamber · Spawning pool · Creep colony · Spore colony · Sunken colony · Hydralisk den
Advanced buildings	Lair · Hive · Spire · Greater spire · Queen's nest · Nydus canal · Defiler mound · Ultralisk cavern · Infested command center
Other	Creep
Scrapped	Mutation chamber · Nydus pit

Zerg Units and Structures of StarCraft II
Land units	Larva · Drone · Zergling · Baneling · Roach · Hydralisk · Infestor · Ultralisk · Queen · Swarm host (HotS)
Air units	Overlord · Overseer · Mutalisk · Brood lord · Corruptor · Viper (HotS)
Spawned units	Broodling · Changeling (WoL) · Infested terran · Locust (HotS)
Basic buildings	Hatchery · Creep tumor · Extractor · Evolution chamber · Spawning pool · Baneling nest · Roach warren
Combat Buildings	Spine crawler · Spore crawler
Advanced buildings	Lair · Hive · Infestation pit · Spire · Greater spire · Hydralisk den · Nydus network · Nydus worm · Ultralisk cavern
Transition units	Egg · Baneling cocoon · Brood lord cocoon · Infested swarm egg · Overseer cocoon
Others	Creep
Campaign-Exclusive Units	Ground units Aberration · Brutalisk · Infested colonist · Infested marine · Omegalisk · Pygalisk · Pygalisk cocoon · Swarmling Air units Leviathan · Sac · Scourge · Swarm guardian Variant units Zergling (Raptor · Swarmling) · Baneling (Gorgeling · Splitterling) · Roach (Leech · Prowler)
Campaign-Exclusive Structures	Infested terran buildings (infested bunker · infested command center) · Spore cannon · Virophage
Canceled Zerg Units and Structures of StarCraft II

Zerg Breeds
Command Strains	Cerebrate · Metamorph · Overlord · Overmind · Queen, original · Queen, new variant (brood mother) · Queen of Blades
Core Strains	Ground Larva · Feederling · Drone · Queen · Zergling · Baneling · Roach · Hydralisk · Lurker · Defiler · Swarm host · Infestor · Nydus worm · Ultralisk · Brutalisk Aerospace Overlord · Overseer · Mutalisk · Guardian · Scourge · Queen · Devourer · Corruptor · Brood lord · Leviathan · Behemoth
Specialist Strains	Ground Zergling (Devouring One · Goblin · Raptor · Screamer · Swarmling · War Zergling) · Baneling (Gorgeling · Kaboomer · Splitterling) · Roach (Leech · Prowler) · Hydralisk (Hunter Killer · Hydolysk · Warg) · Queen (Brood mother · Char Queen) · Infestor (Choker) · Ultralisk (Blade Guardian · Juggernaut · Omegalisk · Pygalisk · Stank · Torrasque) · Brutalisk (Hunterling) · Nydus worm (Left 2 Die Nydus worm) Aerospace Overlord (Brain spectre · Mastermind · Yggdrasill) · Overseer (Spotter) · Mutalisk/Guardian (Drake · Evolved Mutalisk · Gargoyle · Kukulza · Feral Guardian) · Queen (Hand Maiden · Empress · Eschutriarch · Matriarch · Siren)
Spawned/Other	Broodling (Swarmling) · Changeling · Creep · Infested protoss · Locust · Parasite · Probe · Roverlisk · Sac · Swarm
Infested terrans	Aberration · Infested colonist · Infested marine · Explosive · Infestor-spawned · Mutate
Structures	Basic Hatchery · Creep tumor · Extractor · Evolution chamber · Spawning pool · Baneling nest · Eye · Creep colony · Spore colony · Sunken colony · Spine crawler · Spore crawler · Spore cannon · Hydralisk den Advanced Lair · Hive · Infestation pit · Spire · Greater spire · Queen's nest · Nydus canal · Nydus network · Defiler mound · Ultralisk cavern · Infested terran buildings (Infested command center · Infested bunker) · Virophage