![metro 2033 main theme metro 2033 main theme](https://vignette3.wikia.nocookie.net/metro2033/images/e/ea/Biomass.jpg)
Ghosts can only be seen and avoided when using the flashlight and even then, visually, ghosts appear faint. Ghosts are dangerous yet mostly inert and non-hostile entities, capable of damage upon listening to the sound of them in pipes, or capable of killing upon physical contact.
![metro 2033 main theme metro 2033 main theme](https://d19cna3yr6weg2.cloudfront.net/images/prod/score_previews/2858d726-9f30-473f-9525-9a60c1b83557.png)