With Polluted Earth game will block contaminated land, which will spread, replacing other blocks and it will appear mobs. The modification comes with empty settings, so the whole list of replaceable units and mobs you need to set yourself in the mod settings.
How to install Polluted Earth Mod
- Download and install Minecraft Forge
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods