This map is a basic four player big map, but instead of the corners, I put the base walls on each side and made the entrances in different places for the different sides so when units come out of the base they don't start fighting right away, they have to walk a while to get to the enemies base.  Surrounding the base walls is red water, not lava, it looks like lava, but it is not, in this red water you can build units, it acts just like water!  In the middle of the map there is a small metal island with many geothermal vents and some metal things.  This map is 40X40, very big, expect long battles.