log : 19 April 2512 -- 80% of the buildings is produced out of concrete because all other recourses are already gone. After years of research they found out that the green stuff of the Biorifle, the mutagenic sludge, was touching Nature and created strange mutations that are eating stones and Concrete, We are calling them Greenies. All production was stopped. Deep underground there are still activities of the green Mutagenic sludge. It can be reproduced by mixing it with special designed engines. only pure metal like the walls are the only materials to trap them. If you are part of the Green Clan then you need to restart the production process of the sludge by restarting the engines. Because you believe that the greenies are soul keepers and therefore being killed by a greenie means Living forever in a spiritual way. If you are from the research team then you need to do everything to stop them from producing new Mutagenic sludge. Because you know that You only live ones. And that we need to safe our planet.