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Cyst grow.gif
"There's green goop everywhere!"
Kharaa.png Kharaa
Team Resources
Icon team resource neutral.gif 1
70 (450)
Abilities and Upgrades
Spread Infestation
Tech Requirements:
Place on valid ground, Must connect to Hive or nearby Cysts
Build Time: 5 seconds
Builds From: Alien Commander
Buy From: Build Tab
Hotkey: A
Mature Time: 120 seconds


The Cyst is a Kharaa foundational structure created by the Alien Commander. It is a luminescent, pustule-like organic growth with pulsating roots around it.

As the most fragile organ found within any Kharaa habitat, the Cyst can proliferate extremely rapidly. A parent is first grown around a Hive, then daughter Cysts can subsequently branch outward onto horizontal surfaces. When grown, the Cyst spreads bacterial Infestation to encompass nearby terrain, allowing other Kharaa structures to sprout and grow. Cysts depend on Hives for nutrition, and should connection between daughter Cysts be severed, the outermost unconnected Cysts will begin degenerating until death; if left unattended, an entire chain can be eradicated over time. Without Cysts to regenerate the infestation, the nano-grid can slowly eliminate the Bacterium at cellular level.


Spread Infestation

Infestation growing everywhere

Spread Infestation
Contamination icon.gif
Grows Infestation onto nearby terrain to allow Kharaa structures to sprout from and stay nourished.
  • Infestation recedes quickly if the source is destroyed.
Radius 7 (Tunnel), 7.5 (Cyst), 20 (Hive)
Duration ∞ seconds
Targets Ground, Walls, Props
Requires Cyst, Hive, Gorge Tunnel


Cyst Chain

Chaining Cysts to a Resource Nozzle

Cyst Chain
Cyst slot.gif
Connects to an active Hive through other nearby Cysts to stay healthy.
  • Unconnected Cysts take damage over time until reconnection.
  • Redeploy: destroys oldest Cyst if new Cyst is placed inside its minimum range.
Damage 12 per second
Range 24
Minimum Range 6
Requires Nearby Cyst and active Hive


Burning Hydras on the walls

Egg spawn buildmenu.gif
Flammable Kharaa structures will take extra damage from fire-based weapons.
Damage Damage x 250%
Type Flame
Targets Bone Wall, Clog, Contamination, Cyst, Egg, Hydra, Web
Requires Cluster Grenade, Flamethrower, Welder


A newborn Crag slowly maturing

Nutrient mist icon.gif
Most Kharaa structures will mature over time, gaining extra maximum Health and Armor every second until fully matured.
  • Max health/armor and mature time vary between different structures.
  • At 50% maturity, the structure is prefixed as "Grown".
Targets Structure