Mysterious forces have destroyed one of UAC's chemical processing facilities and have reconstructed it to produce massive amounts of a caustic solution. It's being pumped out into various locations and will eventually make the entire surrounding area uninhabitable and leave you with no way out.
Find out who's responsible, and stop it from getting any worse before it's too late!
This WAD takes place at night, so dynamic lights must be enabled to see lightsources outside. Recommended light options: Gamma :+1.60 Vid_contrast :+1.10 Brightness :-0.15