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Xen Spore

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This article is about the Xen plant. For the Half-Life: Opposing Force weapon, see Spore Launcher.

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Xen fungus model.jpg
General information




Game information
  • xen_spore_small (HL1)
  • xen_spore_medium (HL1)
  • xen_spore_large (HL1)

The Spore,[1] also known as the Fungus,[2] is an alien plant-like organism featured in the Half-Life series.


Spores are stationary alien organisms seen in the alien world Xen. They consist of a spherical, beige body with a concave tip, connected to a surface by five dark brown root-like legs. Their body seems to bulge in a manner similar to breathing. They appear in groups and in various sizes, posing no threat to any nearby creatures.

As seen in Half-Life: Alyx, they are part of the Xen flora infestation widespread in the Quarantine Zone outside City 17 during the era of Combine occupation of Earth, being actively eradicated by the Combine.

Behind the scenes[edit]

Comments in the source code indicate some planned but unimplemented features. The three sizes of Spores, small, normal, and large, are set to use different skins, but in the final game, they all only have one texture. When damaged, Spores were to release smoke which would cause damage. It's also suggested that Spores could react in some manner to the player's close proximity, but this behavior isn't specified.

The Dreamcast version features some visual changes along with additional animated features. The tip's appearance is more mouth-like and opens and closes during its breathing motions. Its legs also bend as it pulsates.


List of appearances[edit]

Xen Spore
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Main games[edit]



  1. Its entity name
  2. Half-Life SDK