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Ameba is a type of anomaly occasionally appearing in the standalone Mod S.T.A.L.K.E.R.: Lost Alpha.

No data
- Encyclopedia description, v1.4007


v1.30013 - 1.4005:
  • Not widely spread.
  • Tends to be found in poorly lit areas under shallow water, or well camouflaged in woodland or rough pasture settings.
  • Has a one sec delay before closing like a clam.
  • Has a five sec delay before re-opening if erroneously triggered.
  • Has a ten sec recovery period.
  • Doesn't re-open if the player is inside it, but player may simply walk out of its clutch.
  • Although the attack inflicts severe bleeding upon the unwary, this is due to the chemical nature of the attack according to the game files and not the result of pressure.
  • Game coding is changed with the result that this anomaly is principally coded by and is subsumed into the Grabber anomaly. The result being that Ameba and Grabber may yield the same artifacts, but may or may not be visible on a seemingly ad hoc basis.
  • The previously seen "ameba_spore" is deleted from game code (possibly explaining the absence of "puffballs" in Cordon in v1.4007)
  • Definitely controlled by "zone_ameba1.ltx" but may also be controlled by the original (or other) coding in the gamefiles.
  • Registers on Elite anomaly detectors but may be occasionally invisible to the player (similar to Grabber)


  • Хваталка = Hvatalka = Grabber. The principal form of the anomaly.
v1.30013 - 1.4005:
  • Because of the lethargic attack time of this adversary, the player has plenty of time to walk through its field of effect without mishap.
  • Its attack crushes and destroys vehicles (tested on UAZ)
  • If the player is so unfortunate as to trigger one of these, apart from the intense, life threatening bleeding that is received, the stats of the suit being worn are reduced to zero (100% degradation)
  • If Fuel barrels are pushed into its trigger radius they will be corroded by the anomaly's actions and explode without player intervention (after the timed delay has expired)
  • Liquid Fuel canisters may be pushed quite close to the trigger area without actually triggering it (smaller mass)
  • Although such pyrotechnics give the illusion of damaging the anomaly, it remains quite capable of further attacks.
  • Still a highly potent chemical anomaly which may be defended against with suitable warding.
  • DOES NOT instantly trash the suit of the player and deliver almost irrecoverable bleeding damage. Just "chemical rot" which can be as lethal.


  • If the player is running around and suddenly drops dead, one of these could be the cause - especially if of the invisible sort.