: Right-click the Flatworld.zip file and select Extract All . You need the internal folder (which usually contains files like level.dat ). Locate Your Saves Folder :
: An ocean biome preset with deep water and a gravel floor. Advanced Management
: Drag the extracted world folder into the saves directory.
: Features a high elevation with nearly 230 layers of stone, perfect for underground builds.
: The world should now appear in your Singleplayer world list. Creating a Native Flat World