Stalburg Mushroom Virus
SMV, standing for Stalburg Mushroom Virus, is a bioweapon reportedly researched by S.N.W. One of the main researchers was Xeander Berg, who became infected with it. Jeff Walter was concerned about what S.N.W was going to do with the virus in a letter to him.
A S.N.W investigation by Sven Olsson describes SMV as "a kind of disease that slowly kills the target." It can also cause "strong hallucinations and strange and violent behavior." The origin of the virus seems to precede the bunker itself, since the document says "they found something" while building the bunker. It mentions everyone left the bunker because of some kind of leak that caused immediate evacuation. All the SMV information was sold at some point to an unknown party.
Mushroom Types
Green
Green shrooms are the most abundant type of shrooms found throughout Stalburg, and will kill you if you go near them for too long. They are frequently used as hallucinogenics by the residents, especially in Turnip Hill, where there are drinks, food and even an entire cake centered around these green shrooms.
Blue
The only place in INFRA where blue shrooms are found are in Kevin J Herts's apartment in Turnip Hill in a tank, where Kevin notes that the blue shrooms have healing powers and have cured someone of illness.
Red
The only place in INFRA where red shrooms are found are in tiny amounts on the ground where Xeander Berg and Eric Kleinmann died. It's theorized these shrooms are a byproduct of the green shrooms (SMV) consuming a human body.
It's also worth noting the "special coffee tin" that provides the Morko effect at the Mulex CoPan Coffee Machine has a red lid, which suggests red shrooms have a much different hallucinogenic effect to even summon Morko.
Yellow
TODO
Properties
In a page from the "Mushroom Co. Research & Development Dept." notebook, the shrooms seem to be killed by cold temperatures. It is mentioned the "green glowing shroom part" is gone then. When Antifreeze was poured on the shrooms, they grew bigger, but still didn't survive the cold.