In Metro 2033, Artyom's wristwatch works in real-time, indicates his visibility, and shows the remaining time on his gas mask filters. And it glows in the dark. : r/GamingDetails
Filters | Metro Wiki | Fandom
Metro 2033 (2010) | stephensopinions
Gas Mask | Metro Wiki | Fandom
Filters | Metro Wiki | Fandom
Comunidad Steam :: Guía :: Enter the Metro: A Comprehensive Guide to Metro 2033 Redux