It's just an idea anyway... I was thinking that the entire point of the game is to survive disasters long enough to build a space craft to get off the planet... at a later stage, something that could cause extinction seems like a valid addition to the game... It's avoidable and can obviously be tweaked...
The nanites would only disolve organic matter, so trees flesh and crops would be eaten... Building walls of stone or steel would save you, and colonists would have to stay indoors like in a toxic fallout... The time period could be taken down to 1 or 2 days if it seems too harsh...
The nanites would only disolve organic matter, so trees flesh and crops would be eaten... Building walls of stone or steel would save you, and colonists would have to stay indoors like in a toxic fallout... The time period could be taken down to 1 or 2 days if it seems too harsh...