The Biomass is another mutant species from both novel and game Metro 2033.

Biomass in game

In novel

Biomass was found during the quest for nuclear launcher (for more details, see please site Dark Ones). When squad of stalkers found Metro station under Kremlin, station looked deserted - only thing what left there was armoured train, ready for departure. When they moved deeper into station, a strange thing occured - elevators, unused for good twenty years suddenly started to move.

In game

To be added

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