Reach up to the skies or dig deep below, expand your base vertically... If you're into that kind of thing. Original by Simcra, ported to 0.14-0.16 by Erdbeerbaer. Port to 0.17 started by DeltaNedas and continued by Danacus.
When I load of my game now, all of the underground tiles are deleted and the game crashes when I try loading the underground environment. What mods are currently known to be incompatible?