A defensive structure built on or within the Earth.
DefenseGeologyStructureEngineering
Current best complexity is 7:
Earth Fortress can be discovered in Concepts, categorized under Defense, Geology, Structure, Engineering. A defensive structure built on or within the Earth.
It has been discovered by 2 boards and crafted 2 times, first appearing 15 hours ago. Earth Fortress can be created from 1 recipe, and goes on to appear as an ingredient in 1 other.
Earth Fortress was first discovered by Roman 15 hours ago. They also hold the lowest-complexity recipe, at 7.
Related concepts worth exploring include Volcano, Lava, Geyser, Eruption, Magma, Obsidian, and 6 more.