VX - One of the most toxic substances known to mankind, VX Gas is an extremely toxic colorless, odorless, persistent gas that causes vision dimming, twitching, heavy breathing, and death, followed by convulsions.Primarily an inhalation hazard, some Sarin is absorbed through skin, harming people wearing gas masks. Sarin - Discovered by the germans just before WW2, Sarin Gas is an extremely toxic colorless, odorless gas that causes vision dimming, twitching, heavy breathing, and death, followed by a fit of convulsions.Mustard gas also sticks to objects, requiring decontamination before it can be safely used again Mustard - Responsible for 80% of British Gas Casualties in World War 1, Mustard Gas is an yellow gas that attacks the eyes, lungs and skin, causing coughing and blindness 8 seconds after exposure, and debilitating skin burns 2 minutes after exposure in severe cases.Green-Cross - A 50-50 mix of Chlorine and Phosgene, Green-Cross acts like a less potent form of chlorine, attacking the eyes and lungs, however, the phosgene mixed in proves to be anything from a nuisance to deadly depending on the dose.